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  • 1.
    Albrecht, Malte
    et al.
    Ruhr Univ., Bochum, Germany.
    Caldeira Balkeståhl, Li
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Calén, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Fransson, Kjell
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marciniewski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Schönning, Karin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Pettersson, Joachim
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zmeskal, Johann
    ÖAW, Wien, Austria.
    The Forward Endcap of the Electromagnetic Calorimeter for the PANDA Detector at FAIR2015In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 587, no 1, article id 012050Article in journal (Refereed)
    Abstract [en]

    The versatile 4π-detector PANDA will be built at the Facility for Antiproton and Ion Research (FAIR), an accelerator complex, currently under construction near Darmstadt, Germany. A cooled antiproton beam in a momentum range of 1.5 – 15GeV/c will be provided by the High Energy Storage Ring (HESR). All measurements at PANDA rely on an excellent performance of the detector with respect to tracking, particle identification and energy measurement. The electromagnetic calorimeter (EMC) of the PANDA detector will be equipped with 15744 PbWO(4) crystals (PWO-II), which will be operated at a temperature of – 25° C in order to increase the light output. The design of the forward endcap of the EMC has been finalized. The crystals will be read out with Large Area Avalanche Photo Diodes (LAAPDs) in the outer regions and with Vacuum Photo Tetrodes (VPTTs) in the innermost part. Production of photosensor units utilizing charge integrating preamplifiers has begun. A prototype comprised of 216 PbWO4 crystals has been built and tested at various accelerators (CERN SPS, ELSA/Bonn, MAMI/Mainz), where the crystals have been exposed to electron and photon beams of 25MeV up to 15GeV. The results of these test measurements regarding the energy and position resolution are presented.

  • 2.
    Andersen, S.J.
    et al.
    Technical University of Denmark.
    Sørensen, Jens
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences. Technical University of Denmark.
    Ivanell, Stefan
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
    Mikkelsen, Robert
    Technical University of Denmark.
    Comparison of Engineering Wake Models with CFD Simulations2014In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 524, p. 012161-Article in journal (Refereed)
    Abstract [en]

    The engineering wake models by Jensen [1] and Frandsen et al. [2] are assessed for different scenarios simulated using Large Eddy Simulation and the Actuator Line method implemented in the Navier-Stokes equations. The scenarios include the far wake behind a single wind turbine, a long row of turbines in an atmospheric boundary layer, idealised cases of an infinitely long row of wind turbines and infinite wind farms with three different spacings. Both models include a wake expansion factor, which is calibrated to fit the simulated wake velocities. The analysis highlights physical deficiencies in the ability of the models to universally predict the wake velocities, as the expansion factor can be fitted for a given case, but with not apparent transition between the cases. 1.

  • 3.
    Andersson, Tomas
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
    Zhang, Chaofan
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
    Mikkelä, M. -H
    Anin, Dmitri
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
    Jänkälä, K.
    Tchaplyguine, M.
    Öhrwall, Gunnar
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
    Huttula, M.
    Mårtensson, Nils
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
    Svensson, Svante
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
    Björneholm, Olle
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
    Photon energy influence on valence photoelectron spectra of silver clusters2012In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 388, no 15, p. 152028-Article in journal (Refereed)
    Abstract [en]

    Silver clusters in the size range of ∼102 constituent atoms have been studied using photoelectron spec-troscopy. The 5s and 4d valence bands have been probed with 40 and 60.5 eV photon energies. Differences in the valence band spectral features have been observed and are discussed in view of earlier results on copper clusters and in terms of differences in mean free path for electrons of different energies.

  • 4.
    Angelova Hamberg, Gergana
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Branching ratios for the dissociative recombination of hydrocarbon ions2005In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596Article in journal (Refereed)
  • 5.
    Arvizu, Miguel. A.
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Granqvist, C.-G.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Niklasson, Gunnar
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Electrochromism in Sputter Deposited W1-yMoyO3 Thin Films2016In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, no 012005, p. 1-6Article in journal (Refereed)
  • 6. Azarov, Yu A
    et al.
    Hallén, Anders
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Ion Physics.
    Jensen, Jens
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Ion Physics.
    Aggerstam, T
    Lourdudoss, S
    High dose Fe implantation of GaN: damage build-up and dopant redistribution2008In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 100, no 4, p. 042036-Article in journal (Refereed)
  • 7.
    Belyaev, A. K.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Theoretical Astrophysics.
    Paradoxes of the standard adiabatic born-oppenheimer approach to collision processes: Their origin and possible solutions2012In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 388, no 9, p. 092005-Article in journal (Refereed)
    Abstract [en]

    It is demonstrated that conventional applications of the standard adiabatic Born-Oppenheimer approach lead to paradoxes such as nonzero inelastic cross sections for noninteracting collision systems and infinite inelastic collision cross sections. The origin of these paradoxes is the molecular state problem. The quantum solution of the problem, the multielectron reprojection method, is proposed within the standard BO approach.

  • 8.
    Belyaev, A. K.
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Theoretical Physics.
    Lebedev, O. V.
    Nonadiabatic nuclear dynamics of atomic collisions based on branching classical trajectories2012In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 388, no 9, p. 092007-Article in journal (Refereed)
    Abstract [en]

    The nonadiabatic nuclear dynamics of low-energy Na + H collisions is studied by the branching classical trajectory approach. The calculated inelastic cross sections are in good agreement with the results of full quantum calculations.

  • 9.
    Belyaev, Andrey K.
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Theoretical Astrophysics.
    Barklem, Paul S.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Theoretical Astrophysics.
    Gadéa, F. X.
    Vlasov, D. V.
    Low-energy inelastic Na + H collisions2012In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 388, no 9, p. 092001-Article in journal (Refereed)
    Abstract [en]

    We report full quantum scattering calculations for near-threshold collision cross sections for excitation of Na by H. The calculations include contributions from transitions between all singlet states up to and including the ionic state (ion-pair production). The dynamics calculations are based on three sets of recent ab initio and pseudo-potential quantum-chemical calculations. Considerable sensitivity to the couplings employed is found.

  • 10.
    Belyaev, Andrey K.
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Theoretical Astrophysics.
    Barklem, Paul S.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
    Guitou, M.
    Spielfiedel, A.
    Feautrier, N.
    Vlasov, D. V.
    Rodionov, D. S.
    Ab initio cross sections for low-energy inelastic Mg+H collisions2012In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 388, no 9, p. 092002-Article in journal (Refereed)
    Abstract [en]

    Full quantum scattering calculations of cross sections for low-energy near-threshold inelastic Mg + H collisions are reported, such processes being of interest for modelling of Mg spectral lines in stellar atmospheres. Nonadiabatic transions associated with radial couplings at avoided ionic crossings in the 2Σ+ molecular states are found to be the main mechanism for excitation and ion-pair production processes.

  • 11.
    Belyaev, Andrey K.
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Theoretical Astrophysics.
    Lebedev, O. V.
    Domcke, W.
    Nonadiabatic nuclear dynamics in the ammonia cation studied by the branching classical trajectory method2012In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 388, no 10, p. 102005-Article in journal (Refereed)
    Abstract [en]

    The photoinduced nonadiabatic nuclear dynamics of the ammonia cation is studied by the branching classical trajectory approach. The time-dependent populations of different electronic states of the ammonia cation are calculated and are in good agreement with the results of full quantum calculations.

  • 12.
    Biernat, Jacek
    et al.
    JagellonianUniv., Cracow, Poland.
    Caldeira Balkeståhl, Li
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Fransson, Kjell
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marciniewski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Schönning, Karin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Pettersson, Joachim
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zmeskal, Johann
    ÖAW, Wien, Austria.
    Feasibility studies for the Forward Spectrometer2015In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 599, no 1, article id 012002Article in journal (Refereed)
    Abstract [en]

    The Forward Spectrometer designed for the P̄ANDA detector will consist of many different detector systems allowing for precise track reconstruction and particle identification. Feasibility studies for Forward Spectrometer done by means of specific reactions will be presented. In the first part of the paper, results of simulations focussing on rate estimates of the tracking stations based on straw tubes will be presented. Next, the importance of the Forward Tracker will be demonstrated through the reconstruction of the ψ(4040) → DD̄ decay. Finally, results from the analysis of the experimental data collected with a straw tube prototype designed and constructed at the Research Center in Juelich will be discussed.

  • 13.
    Bolognesi, P.
    et al.
    CNR, Ist Struttura Mat, UOS Montelibretti, Area Ric Roma1, I-00185 Rome, Italy..
    O'Keeffe, P.
    CNR, Ist Struttura Mat, UOS Montelibretti, Area Ric Roma1, I-00185 Rome, Italy..
    Mazza, T.
    European XFEL GmbH, D-22761 Hamburg, Germany..
    Bozek, J.
    SLAC Natl Accelerator Lab, LCLS, Menlo Pk, CA 94025 USA..
    Coffee, R.
    SLAC Natl Accelerator Lab, LCLS, Menlo Pk, CA 94025 USA..
    Bostedt, C.
    SLAC Natl Accelerator Lab, LCLS, Menlo Pk, CA 94025 USA..
    Schorb, S.
    SLAC Natl Accelerator Lab, LCLS, Menlo Pk, CA 94025 USA..
    Carron, S.
    SLAC Natl Accelerator Lab, LCLS, Menlo Pk, CA 94025 USA..
    Feifel, Raimund
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy.
    Mucke, Melanie
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics. Uppsala Univ, Dept Phys & Astron, SE-75120 Uppsala, Sweden..
    Guehr, M.
    SLAC Natl Accelerator Lab, PULSE, Menlo Pk, CA 94025 USA..
    Sistrunk, E. F.
    SLAC Natl Accelerator Lab, PULSE, Menlo Pk, CA 94025 USA..
    Grilj, J.
    SLAC Natl Accelerator Lab, PULSE, Menlo Pk, CA 94025 USA..
    McFarland, B. K.
    SLAC Natl Accelerator Lab, PULSE, Menlo Pk, CA 94025 USA..
    Koch, M.
    SLAC Natl Accelerator Lab, PULSE, Menlo Pk, CA 94025 USA..
    Larsson, M.
    Univ Stockholm, Dept Phys, S-10691 Stockholm, Sweden..
    Salem, P.
    Univ Stockholm, Dept Phys, S-10691 Stockholm, Sweden..
    Berrah, N.
    Univ Connecticut, Dept Phys, Storrs, CT 06269 USA..
    Fang, L.
    Univ Connecticut, Dept Phys, Storrs, CT 06269 USA..
    Osipov, T.
    Univ Connecticut, Dept Phys, Storrs, CT 06269 USA..
    Murphy, B.
    Univ Connecticut, Dept Phys, Storrs, CT 06269 USA..
    Lucchese, R. R.
    Texas A&M Univ, Dept Chem, College Stn, TX 77843 USA..
    Meyer, M.
    European XFEL GmbH, D-22761 Hamburg, Germany..
    Piancastelli, Maria Novella
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
    Ueda, K.
    Tohoku Univ, Dept Phys, Sendai, Miyagi 9808577, Japan..
    Mondal, S.
    Tohoku Univ, Dept Phys, Sendai, Miyagi 9808577, Japan..
    Miron, C.
    Synchrotron SOLEIL, F-91192 Gif Sur Yvette, France..
    Richter, R.
    Elettra Sincrotrone Trieste, I-34149 Basovizza, Italy..
    Prince, K. C.
    Elettra Sincrotrone Trieste, I-34149 Basovizza, Italy..
    Takahashi, O.
    Hiroshima Univ, Dept Chem, Hiroshima, Japan..
    Avaldi, L.
    CNR, Ist Struttura Mat, UOS Montelibretti, Area Ric Roma1, I-00185 Rome, Italy.;Elettra Sincrotrone Trieste, I-34149 Basovizza, Italy..
    A study of the dynamical energy flow in uracil2015In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 635, article id 112062Article in journal (Refereed)
    Abstract [en]

    The time resolved photoionization of C 1s in uracil following excitation of the neutral molecule by 260 nm pulses has been studied at LCLS.

  • 14.
    Bowen, K. P.
    et al.
    Univ Nevada, Dept Chem & Biochem, Las Vegas, NV 89154 USA..
    Hemmers, O.
    Univ Nevada, Dept Chem & Biochem, Las Vegas, NV 89154 USA..
    Guillemin, R.
    Univ Paris 06, CNRS, Lab Chim Phys Mat & Rayonnement, UMR 7614, Paris 05, France..
    Stolte, W. C.
    Natl Secur Technol LLC NSTec, Livermore Operat, Livermore, CA USA..
    Piancastelli, Maria Novella
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
    Lindle, D. W.
    Univ Nevada, Dept Chem & Biochem, Las Vegas, NV 89154 USA..
    Nondipole Effects in Chiral Molecules Measured with Linearly Polarized Light2015In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 635, article id 112053Article in journal (Refereed)
    Abstract [en]

    We present the first-ever measurement of nondipole chiral angular distribution parameters for C 1s photoemission from each enantiomer of camphor in the photon energy range 296-343eV using linearly polarized light. The angular distribution parameters are determined to be enantiomer-specific, suggesting a new form of linear dichroism.

  • 15.
    Bremer, Daniel
    et al.
    JLU Giessen Univ., Giessen, Germany.
    Caldeira Balkeståhl, Li
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Calén, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Fransson, Kjell
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marciniewski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Schönning, Karin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Pettersson, Joachim
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zmeskal, Johann
    ÖAW, Wien, Austria.
    Performance of prototypes for the PANDA barrel EMC2015In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 587, no 1, article id 012052Article in journal (Refereed)
    Abstract [en]

    The PANDA experiment will be part of the future Facility for Antiproton and Ion Research (FAIR) and aims for the study of strong interaction within the charm sector via antiproton proton collisions up to antiproton momenta of 15 GeV/c. Reflecting the variety of the physics program the PANDA detector is designed as a multi-purpose detector able to perform tracking, calorimetry and particle identification with nearly complete coverage of the solid angle. The Electromagnetic Calorimeter (EMC) contained inside its Target Spectrometer is based on cooled PbWO(4) scintillator crystals. In order to ensure an excellent performance throughout the large dynamic range of photon/electron energies ranging from a few MeV up to 15 GeV an extensive prototyping phase is mandatory. This contribution describes the measured response of the EMC barrel part prototype PROTO60 at the largest design energy to secondary beams provided by the SPS at CERN. In addition to PROTO60 a tracking station was deployed, providing precise position information of the 15 GeV/c positrons. For calibration purposes a 150 GeV/c muon beam and cosmic radiation, in combination with estimations from GEANT4 simulations were used. The obtained performance concerning energy, position and time information is presented.

  • 16.
    Böser, S
    et al.
    DESY, Germany.
    Bohm, C
    Descamps, F
    Fischer, J
    Hallgren, Allan
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics, High Energy Physics.
    Heller, R
    Hulth, P O
    Hundertmark, S
    Krieger, K
    Nahnhauer, R
    Pohl, M
    Price, B
    Sulanke, K
    Vandenbroucke, J
    SPATS: An acoustic array at the South Pole2007In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 60, p. 292-295Article in journal (Other academic)
    Abstract [en]

    The detection of extraterrestrial EHE neutrinos requires detection volumes at least one order of magnitude larger than currently constructed km3 optical neutrino detectors. In ice, it is anticipated that the absorption length for acoustic waves reaches up to to several kilometers. This makes ice an attractive host environment for a next generation acoustic neutrino detector. To measure the acoustic properties of ice at South Pole, a test setup has been developed, ready to be deployed in the 2006/07 summer season.

  • 17.
    Böser, S
    et al.
    DESY, Germany.
    Bohm, C
    Descamps, F
    Fischer, J
    Hallgren, Allan
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy.
    Heller, R
    Hundertmark, S
    Krieger, K
    Nahnhauer, R
    Pohl, M
    Price, B
    Sulanke, K
    Vandenbroucke, J
    Status of the South Pole Acoustic Test Setup2007In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 81, no 1, p. 012010-Article in journal (Other academic)
    Abstract [en]

    Due to the low flux of ultra-high energetic neutrinos induced in interactions of cosmic rays with the cosmic microwave background, very large instrumented volumes and new registration techniques are necessary for their detection. The south polar ice offers the unique opportunity to implement existing Cherenkov techniques as well as registration of radio and acoustic waves from the neutrino interaction. A simulation of a ~ 120 km3 hybrid optical/radio/acoustic detector showed that event rates of ~ 10 per year can be achieved. In this simulation the ultrasonic parameters of antarctic ice regarding absorption, scattering and environmental noise pose the key uncertainty. To evaluate the acoustic properties in-situ, the South Pole Acoustic Test Setup (SPATS) has been created. An array of custom-made ultrasonic sensors and transmitters will be deployed on three strings in the upper 400 m of the holes of the IceCube experiment. The status of the experiment and a first evaluation of its performance are presented here.

  • 18.
    Böser, S
    et al.
    DESY, Germany.
    Bohm, C
    Descamps, F
    Fischer, J
    Hallgren, Allan
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy.
    Heller, R
    Hundertmark, S
    Krieger, K
    Nahnhauer, R
    Pohl, M
    Price, P B
    Sulanke, K
    Vandenbroucke, J
    The South Pole Acoustic Test Setup: calibrations and lake test2007In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 81, p. 012016-Article in journal (Refereed)
    Abstract [en]

    Abstract. In order to detect the small neutrino fluxes expected at ultra-high energies, large volumes of materials have to be instrumented with inexpensive but sensitive acoustic sensors. The South Pole Acoustic Test Setup (SPATS) will be installed in the Antarctic ice during the polar season 2006/2007 after which the collected data will be used to reveal the acoustic properties of the South Polar ice cap. The developed piezoceramic based ultrasound sensors and transmitters that are part of this system have been extensively studied during calibration measurements in water, using a commercial hydrophone as reference. Also, a SPATS system test was accomplished in Lake Torneträsk, Abisko (Sweden). This allowed verification of the DAQ system, transmitter range and sensor performance. Here the results of the calibrations and the Abisko lake measurements are reported.

  • 19. Chapman, H N
    et al.
    Bajt, S
    Barty, A
    Benner, W H
    Bogan, M J
    Boutet, S
    Cavalleri, A
    Duesterer, S
    Frank, M
    Hajdu, Janos
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Cell and Molecular Biology, Molecular biophysics.
    Hau-Riege, S P
    Iwan, B
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Cell and Molecular Biology, Molecular biophysics.
    Marchesini, S
    Sakdinawat, A
    Sokolowski-Tinten, K
    Seibert, Marvin M
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Cell and Molecular Biology, Molecular biophysics.
    Timneanu, Nicusor
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Cell and Molecular Biology, Molecular biophysics.
    Treusch, R
    Woods, B W
    Coherent imaging at FLASH2009In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 186, no 1, p. 012051-Article in journal (Refereed)
    Abstract [en]

    We have carried out high-resolution single-pulse coherent diffractive imaging at the FLASH free-electron laser. The intense focused FEL pulse gives a high-resolution low-noise coherent diffraction pattern of an object before that object turns into a plasma and explodes. In particular we are developing imaging of biological specimens beyond conventional radiation damage resolution limits, developing imaging of ultrafast processes, and testing methods to characterize and perform single-particle imaging.

  • 20.
    Dancila, Dragos
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, FREIA. Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Electronics. Uppsala University.
    Hoang Duc, Long
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, FREIA. Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Electronics.
    Jobs, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, FREIA.
    Holmberg, Måns
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, FREIA.
    Hjort, Adam
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, FREIA.
    Rydberg, Anders
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, FREIA. Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Electronics.
    Ruber, Roger
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, FREIA. Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    A compact 10 kW solid-state RF power amplifier at 352 MHz2017In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 874, article id 012093Article in journal (Refereed)
    Abstract [en]

    A compact 10 kW RF power amplifier at 352 MHz was developed at FREIA for the European Spallation Source, ESS. The specifications of ESS for the conception of amplifiers are related to its pulsed operation: 3.5 ms pulse length and a duty cycle of 5%. The realized amplifier is composed of eight kilowatt level modules, combined using a planar Gysel 8-way combiner. The combiner has a low insertion loss of only 0.2 dB, measured at 10 kW peak power. Each module is built around a commercially available LDMOS transistor in a single-ended architecture. During the final tests, a total output peak power of 10.5 kW was measured.

  • 21. De Toro, J. A.
    et al.
    Lee, S. S.
    Mathieu, Roland
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Normile, P. S.
    Salazar, D.
    Cheong, J. L.
    Muñiz, P.
    Riveiro, J. M.
    Hillenkamp, M.
    Tamion, A.
    Tournus, F.
    Nordblad, Per
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Ideal superspin glass behaviour in a random-close-packed ensemble of maghemite nanoparticles2014In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 521, no 1, p. 012011-Article in journal (Refereed)
  • 22. Fang, L.
    et al.
    Osipov, T.
    Murphy, B.
    Juranic, P.
    Berrah, N.
    Kukk, E.
    Ueda, K.
    Feifel, R.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Soft X-Ray Physics.
    van der Meulen, P.
    Salen, P.
    Schmidt, H.
    Thomas, R.
    Larsson, M.
    Richter, R.
    Prince, K. C.
    Bozek, J. D.
    Bostedt, C.
    Wada, S.
    Piancastelli, M.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Surface and Interface Science.
    Tashiro, M.
    Ehara, M.
    Tarantelli, F.
    Multiple Ionization and Double Core-hole Production in Molecules using the LCLS X-ray FEL2012In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 388, no 3, p. 032028-Article in journal (Refereed)
    Abstract [en]

    We used the world's first hard x-ray FEL to investigate the response of molecular systems to the ultra-intense, femtosecond x-ray radiation. We report sequential multiphoton ionization, frustrated absorption and double core hole production mechanisms.

  • 23.
    Fioravanti, Elisa
    et al.
    INFN, Ferrarra, Italy.
    Caldeira Balkeståhl, Li
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Calén, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Fransson, Kjell
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marciniewski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Schönning, Karin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Pettersson, Joachim
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zmeskal, Johann
    ÖAW, Wien, Austria.
    Experimental overview of the PANDA experiment2014In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 503, article id 012030Article in journal (Refereed)
    Abstract [en]

    The physics program of the (anti-Proton ANhiliation ar DArmstadt) experiment will address various questions related to the strong interactions by employing a multi-purpose detector system at the High Energy Storage Ring (HESR) for anti-protons of the upcoming Facility for Anti-proton and Ion Research (FAIR). The excellent antiproton beam resolution of Δp/p ~ 10−5 and the high luminosity =2×1032cm−2 s−1 will allow the precise measurement of the charmonium and open charm spectroscopy, the search for exotic hadrons like multiquarks, glueballs and hybrids, the study of in-medium modifications of hadrons and the nucleon structure.

  • 24.
    Flechl, Martin
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Nuclear and Particle Physics, High Energy Physics.
    Field, Laurence
    Grid interoperability: joining grid information systems2007In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 119, no 6, p. 062030-Article in journal (Refereed)
    Abstract [en]

    A grid is defined as being 'coordinated resource sharing and problem solving in dynamic, multi-institutional virtual organizations'. Over recent years a number of grid projects, many of which have a strong regional presence, have emerged to help coordinate institutions and enable grids. Today, we face a situation where a number of grid projects exist, most of which are using slightly different middleware. Grid interoperation is trying to bridge these differences and enable Virtual Organizations to access resources at the institutions independent of their grid project affiliation. Grid interoperation is usually a bilateral activity between two grid infrastructures. Recently within the Open Grid Forum, the Grid Interoperability Now (GIN) Community Group is trying to build upon these bilateral activities. The GIN group is a focal point where all the infrastructures can come together to share ideas and experiences on grid interoperation. It is hoped that each bilateral activity will bring us one step closer to the overall goal of a uniform grid landscape. A fundamental aspect of a grid is the information system, which is used to find available grid services. As different grids use different information systems, interoperation between these systems is crucial for grid interoperability. This paper describes the work carried out to overcome these differences between a number of grid projects and the experiences gained. It focuses on the different techniques used and highlights the important areas for future standardization.

  • 25. Giovannella, Simona
    et al.
    Caldeira Balkeståhl, Li
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Höistad, Bo
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Redmer, Christoph
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    U boson searches at KLOE2011In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 335, no 1, p. 012067-Article in journal (Refereed)
    Abstract [en]

    The existence of a secluded gauge sector could explain several puzzling astrophysical observations. This hypothesis can be tested at low energy e + e − colliders such as DAΊNE. Preliminary results obtained with KLOE data and perpectives for the KLOE-2 run, where a larger data sample is expected, are discussed.

  • 26. Gisselbrecht, M.
    et al.
    Grunewald, C.
    Månsson, E.
    Laksman, J.
    Sankari, A.
    Tchaplyguine, M.
    Björneholm, Olle
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
    Sorensen, S. L.
    Charge migration and decay of doubly charged ammonia clusters2012In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 388, no 2, p. 022112-Article in journal (Refereed)
    Abstract [en]

    The photo-fragmentation of ammonia molecular clusters ionized with soft x-rays is studied for photon energies near the N-1s threshold. The fragmentation is studied with a 3D momentum mass spectrometer to access the energy and angular correlations between fragments. By choosing the cluster sizes below or above the critical size of stable dication, we investigate the coulomb explosion dynamics and the interplay between charge delocalization and mobility of molecules in the clusters.

  • 27.
    Goldsztejn, G.
    et al.
    CNRS, UMR 7614, Lab Chim Phys Matiere & Rayonnement, F-75005 Paris, France.;Univ Paris 06, Univ Paris 04, Lab Chim Phys Matiere & Rayonnement, UMR 7614, F-75005 Paris, France..
    Marchenko, T.
    CNRS, UMR 7614, Lab Chim Phys Matiere & Rayonnement, F-75005 Paris, France.;Univ Paris 06, Univ Paris 04, Lab Chim Phys Matiere & Rayonnement, UMR 7614, F-75005 Paris, France..
    Guillemin, R.
    CNRS, UMR 7614, Lab Chim Phys Matiere & Rayonnement, F-75005 Paris, France.;Univ Paris 06, Univ Paris 04, Lab Chim Phys Matiere & Rayonnement, UMR 7614, F-75005 Paris, France..
    Journel, L.
    CNRS, UMR 7614, Lab Chim Phys Matiere & Rayonnement, F-75005 Paris, France.;Univ Paris 06, Univ Paris 04, Lab Chim Phys Matiere & Rayonnement, UMR 7614, F-75005 Paris, France..
    Kushawaha, R. K.
    CNRS, UMR 7614, Lab Chim Phys Matiere & Rayonnement, F-75005 Paris, France.;Univ Paris 06, Univ Paris 04, Lab Chim Phys Matiere & Rayonnement, UMR 7614, F-75005 Paris, France..
    Puettner, R.
    Free Univ Berlin, Inst Expt Phys, D-14195 Berlin, Germany..
    Ceolin, D.
    Synchrotron SOLEIL, Orme Merisiers, F-91192 Gif Sur Yvette, France..
    Piancastelli, Maria Novella
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics. CNRS, UMR 7614, Lab Chim Phys Matiere & Rayonnement, F-75005 Paris, France.;Univ Paris 06, Univ Paris 04, Lab Chim Phys Matiere & Rayonnement, UMR 7614, F-75005 Paris, France..
    Simon, M.
    CNRS, UMR 7614, Lab Chim Phys Matiere & Rayonnement, F-75005 Paris, France.;Univ Paris 06, Univ Paris 04, Lab Chim Phys Matiere & Rayonnement, UMR 7614, F-75005 Paris, France.;Synchrotron SOLEIL, Orme Merisiers, F-91192 Gif Sur Yvette, France..
    Ultrafast Dynamics And Electronic State - Lifetime Interferences In Chlorine-Containing Molecules2015In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 635, article id 112092Article in journal (Refereed)
    Abstract [en]

    In order to have access to fine phenomena such as ultrafast nuclear dynamics and electronic state - lifetime interferences (ELI) at high energies (few keV), one has to rely on great experimental resolution. The new experimental HAXPES endstation at the GALAXIES beamline of the French synchrotron SOLEIL provides photons in the 2-12 keV energy range along with a total instrumental resolution below 500 meV. In this work we show experimental evidences of ultrafast nuclear dynamics and ELI on HCl and CH3Cl excited around the Cl 1s resonance. We show also simulations that allow to disentangle the contribution of nuclear dynamics and ELI in our experimental spectra.

  • 28.
    Granqvist, C.-G.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Thermochromic Vanadium-Dioxide-Based Thin Films and Nanoparticles: Survay of Some Buildings-Related Advances2016In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 764, no 012002, p. 1-11Article in journal (Refereed)
  • 29.
    Granqvist, Claes Göran
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Azens, A
    Smulko, J
    Kish, L B
    Oxide-Based Electrochromics for Energy Efficient Buildings: Materials, Technologies, Testing, and Perspectives2007In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 93, no 1, p. 012021-Article in journal (Refereed)
    Abstract [en]

    Electrochromic oxide films form the basis of "smart windows", which are of much interest in forthcoming building technology and are able to provide energy efficiency and indoor comfort simultaneously. This paper introduces "smart windows" technology, which now seems ready for large-scale applications. Electrochromics is discussed from the viewpoints of materials, device design, low-cost manufacturing, and applications to buildings as well as some niche products. Finally there are some perspectives on the future role of oxide electrochromics in the built environment.

  • 30. Guitou, M.
    et al.
    Belyaev, A. K.
    Spielfiedel, A.
    Feautrier, N.
    Barklem, P. S.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Theoretical Astrophysics.
    Mg-H collision rates for non-LTE determination of stellar atmospheric parameters2012In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 397, no 1, p. 012053-Article in journal (Refereed)
  • 31.
    Heiter, Ulrike
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Observational Astronomy.
    Barklem, Paul
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Theoretical Astrophysics.
    Fossati, L.
    Kildiyarova, R.
    Kochukhov, Oleg
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Observational Astronomy.
    Kupka, F.
    Obbrugger, M.
    Piskunov, Nikolai
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Observational Astronomy.
    Plez, Bertrand
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy.
    Ryabchikova, T.
    Stempels, H. C.
    Stütz, C.
    Weiss, W. W.
    VALD — an atomic and molecular database for astrophysics2008In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 130, p. 012011-Article in journal (Refereed)
    Abstract [en]

    The VALD database of atomic and molecular data aims to ensure a robust and consistent analysis of astrophysical spectra. We offer a convenient e-mail and web-based user interface to a vast collection of spectral line parameters for all chemical elements and in the future also for molecules. An international team is working on the following tasks: collecting line parameters from relevant theoretical and experimental publications, computing line parameters, evaluating the data quality by comparison of similar data from different sources and by comparison with astrophysical observations, and incorporating the data into VALD. A unique feature of VALD is its capability to provide the most comprehensive spectral line lists for specific astrophysical plasma conditions defined by the user.

  • 32.
    Heiter, Ulrike
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Observational Astronomy.
    Lebzelter, T.
    Gaia spectroscopy overview and comparative spectrum modeling for cool giants2011In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 328, no Conference 1, p. 012001-Article in journal (Refereed)
    Abstract [en]

    The Gaia mission will provide spectroscopic and spectrophotometric observations for a vast number of stars, allowing a characterization in terms of stellar parameters along with the astrometric measurements. The pipeline for astrophysical parameter determination relies on libraries of model spectra for mapping stellar parameters to flux distributions. To maximize the reliability of the parametrization, adequate efforts are required to assess the realism of the model spectra and to calibrate the analysis methods. We describe a spectrum modelling experiment, in which high-resolution optical and infrared spectra of four cool giant stars were analysed by 14 different groups. The resulting variance in derived stellar parameters illustrates the need to be cautious when comparing or combining stellar parameters from different model atmospheres and analysis strategies. The main causes for the differences in parameters derived by different groups seem to lie in the physical input data and in the details of the analysis method.

  • 33.
    Hermansson, Kersti
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Materials Chemistry, Structural Chemistry.
    Gajewski, G
    Mitev, Pavlin
    Pressure-induced OH frequency downshift in brucite: frequency-distance and frequency-field correlations2008In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 117, p. 012018-Article in journal (Refereed)
    Abstract [en]

    The ordered Mg(OH)

    the pressure range 0

    for the Raman-active OH vibrational mode were calculated from potential energy curves

    obtained by B3LYP and PW91 calculations with the

    external pressure leads to an OH frequency downshift, in agreement with experiment, but there

    are no hydrogen bonds involved. The frequency downshift depends linearly on the electric

    field exerted on the OH

    experiment we also find that the pressure-induced '

    deviates from the well established correlation curves for hydrogen-bonded systems in the

    literature; the

    merits of reporting both

    2 crystal structure has been optimized for different pressures in−21 GPa, within the trigonal P 3 m1 space group. Anharmonic frequenciesCRYSTAL06 program. We find that an− ions from its neighbours in the "opposite" layer. In agreement withν(OH) vs. interlayer R(O - - - O)' curveΔν/ΔR slope for high pressure conditions is much smaller. We also point out theν(OH) and Δνgas-to-solid for comparison with experiment.

  • 34.
    Hobein, Matthias
    et al.
    Stockholms universitet, Fysikum.
    Solders, Andreas
    Stockholms universitet, Fysikum.
    Suhonen, Markus
    Stockholms universitet, Fysikum.
    Liu, Yuwen
    Kamalou, Omar
    Schuch, Reinhold
    Stockholms universitet, Fysikum.
    Re-trapping and cooling of highly-charged2009In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 163, p. 012109-Article in journal (Refereed)
    Abstract [en]

    Presently, a trapping system for cooling highly-charged ions (HCI) is being set up at AlbaNova at Stockholm University. The experiment aims at production of low temperature (emittance) HCI at very low energy. HCI are extracted from the new Stockholm EBIT (S-EBIT) before evaporative cooling is applied in a Penning trap. In the future the cooled ions will be injected into the precision trap of the high-precision mass spectrometer SMILETRAP II. In first tests the emittance of trapped ions was measured and it was shown that highly and low-charged ions could be simultaneously stored

  • 35.
    Jensen, Jens
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Ion Physics.
    Possnert, Göran
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Ion Physics.
    Zhang, Y
    Temperature effect on low-k dielectric thin films studied by ERDA2008In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 100, no 1, p. 012041-Article in journal (Refereed)
  • 36. Kaminska, Daria
    et al.
    Caldeira Balkeståh, Li
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Study of KS semileptonic decays and CPT test with the KLOE detector2015In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 631, no 1, article id 012042Article in journal (Refereed)
  • 37. Kavatsyuk, M.
    et al.
    Guliyev, E.
    Lemmens, P.
    Löhner, H.
    Poelman, T.P.
    Tambave, G.
    Caldeira Balkeståhl, Li
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Calén, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Fransson, Kjell
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marciniewski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Thomé, Erik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Front-End Electronics and Feature-Extraction Algorithm for the PANDA Electromagnetic Calorimeter2011In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 293Article in journal (Refereed)
    Abstract [en]

    The PANDA collaboration at FAIR, Germany, will employ antiproton annihilations to investigate yet undiscovered charm-mesons and glueballs aiming to unravel the origin of hadronic masses. A multi-purpose detector for tracking, calorimetry and particle identification is presently being developed to run at high luminosities providing up to 2.10 7 interactions/s. A trigger-less data-acquisition system will be employed with sub-detectors continuously providing data from incoming physics events. This paper describes readout electronics and the treatment of the digitised preamplifier signal for the Electromagnetic Calorimeter. The use of a Sampling ADC in the readout allows to achieve the design goals, namely a large dynamic range from 1 MeV to 10 GeV, a count-rate dependent low trigger threshold of about 1-3 MeV, and a time resolution better than 1 ns.

  • 38.
    Kliemt, Ralf
    et al.
    GSI, Darmstadt, Germany.
    Caldeira Balkeståhl, Li
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Calén, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Fransson, Kjell
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marciniewski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Schönning, Karin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Pettersson, Joachim
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zmeskal, Johann
    ÖAW, Wien, Austria.
    The PANDA experiment2015In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 599, no 1, article id 012001Article in journal (Refereed)
    Abstract [en]

    The PANDA (anti-Proton ANnihiliation at DArmstadt) experiment will be a multipurpose apparatus at the future Facility for Antiproton and Ion Research (FAIR) at Darmstadt. Anti-proton induced reactions with 1.5 to 15 GeV/c beam momentum at high luminosities of up to 2•10(32)/(s•cm(2)) will be investigated. Exclusive detection of whole events with almost 4π acceptance and high precision are needed for the broad physics program. The focus lies on studying the strong interaction in the charm region, by charmonium, open-charm and baryon spectroscopy, and includes the search for glueballs, hybrids and other exotics, hypernuclear physics, nucleon structure studies as well as in-medium modifications of hadrons.

  • 39.
    Kolorenc, P.
    et al.
    Charles Univ Prague, Inst Theoret Phys, Prague, Czech Republic..
    Averbukh, V.
    Imperial Coll London, Dept Phys, London, England..
    Eland, J.
    Univ Oxford, Phys & Theoret Chem Lab, Oxford OX1 2JD, England..
    Feifel, Raimund
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy.
    Tarantelli, F.
    Univ Perugia, Dipartimento Chim, I-06100 Perugia, Italy.;CNR, ISTM, I-00185 Rome, Italy..
    Three-electron collective Auger decay in CH3F2015In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 635, article id 112031Article in journal (Refereed)
    Abstract [en]

    We report on experimental and theoretical study of collective Auger decay of double inner-valence vacancy in fluoromethane, in which two electrons simultaneously fill the vacancies and a third electron is ejected to continuum. Calculations predict the respective lifetime of the double vacancy state to be in the femtosecond range, typical for two-electron Auger decay. Measured electron spectra indirectly support this rather surprising result.

  • 40. Kowalik, I. A.
    et al.
    Öhrwall, G.
    Jensen, B. N.
    Sankari, R.
    Wallén, E.
    Johansson, U.
    Karis, Olof
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Surface and Interface Science.
    Arvanitis, Dimitri
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Surface and Interface Science.
    Description of the new I1011 beamline for magnetic measurements using synchrotron radiation at MAX-lab2010In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 211, no 1, p. 012030-Article in journal (Refereed)
    Abstract [en]

    We report on the characterization of the new I1011 beamline at the MAX-II storage ring, in the MAX-lab synchrotron radiation laboratory and give examples of first results. This beamline is using an Elliptically Polarizing Undulator source, producing soft x-rays of a variable polarization state. It delivers high flux and high brightness circularly polarized x-rays in the energy range 0.2 to 1.7 keV, covering the L-edges of the late 3d elements. The new beamline will operate with an octupole magnet endstation. It is specially engineered to solve the problem of the limited optical access typically associated with magnetic fields and synchrotron radiation endstations. Eight water-cooled magnets allow the application of the magnetic field of up to 1 T in any direction. X-ray absorption spectroscopy, X-ray resonant reflectivity and the corresponding magnetic variants, i.e., XMCD, XMLD and XRMS experiments are possible also under an applied magnetic field. The high flux allows working with dilute magnetic systems such as ultra-thin films and nano structures.

  • 41.
    Kubart, Tomas
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Electronics.
    Zhao, Shuxi
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Wingqvist, Gunilla
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Nyberg, Tomas
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Wäckelgård, Ewa
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Berg, Sören
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    A model of DC reactive magnetron sputtering for graded solar thermal absorbers2008In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 100, no 8, p. 082024-Article in journal (Refereed)
    Abstract [en]

    In this work we present process modelling of reactive in-line sputtering. Although modelling of reactive sputtering is often used, most models are based on assumptions which make them insufficient for use in this case. The presented model takes into account a realistic deposition rate profile and distribution of reactive gas pressure. The model has been applied to reactive sputter deposition of graded solar thermal absorbers. It has been shown that the presented model represents a simple alternative to complex Monte Carlo simulations while still representing all important features of the process.

  • 42. Kvashnina, K. O.
    et al.
    Butorin, S. M.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Materials Science, Soft X-Ray Physics.
    Cui, D.
    Vegelius, J.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Materials Science, Soft X-Ray Physics.
    Puranen, A.
    Gens, R.
    Glatzel, P.
    Electron transfer during selenium reduction by iron surfaces in aqueous solution: high resolution X-ray absorption study2009In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 190, no 1, p. 012191-Article in journal (Refereed)
    Abstract [en]

    We present a study of selenate (SeO42-) on an iron surface in ground water solution by X-ray absorption near-edge spectroscopy. Spectral sharpening is obtained by using the high energy resolution fluorescence detection technique that also efficiently suppresses the strong fluorescence signal from the Fe surface in the highly dilute samples (Se concentration < 3 ppm). We observe fully reduced Se on polished Fe surfaces while no changes are found for Se on oxidized Fe surface.

  • 43.
    Li, Hu
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences.
    Wani, Ishtiaq Hassan
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences.
    Anumol, Ashok
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences.
    Han, Yuanyuan
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences.
    Jafri, S. Hassan M.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences.
    Somobrata, Acharya
    Centre for Advanced Materials (CAM) , Indian Association for the Cultivation of Science, India.
    Leifer, Klaus
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences.
    Enhanced gas sensing performance of graphene/ZnS-CdS hetero-nanowires gas sensor synthesized by Langmuir-Blodgett self-assembly method2017In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 922, article id 012023Article in journal (Refereed)
    Abstract [en]

    Graphene is a promising material in the field of solid-state gas sensors due to the unique two-dimensional structure. Here, we have shown by fabricating graphene/ZnS-CdS hetero-nanowire structure, the gas sensor sensitivity has a two-fold increase to 20% under 15 ppm gaseous concentration compared to a 10% response in pristine graphene. Spectroscopy and microscopy analysis indicate that the semi-conducting ZnS-CdS hetero-nanowires are 2 nm wide and densely packed on top of graphene. By combining UV illumination, the device approaches a fast response/recovery and high gas sensitivity, thus has a potential to be used in a detection of wide range of gases. 

  • 44.
    Ma, Binsong
    et al.
    IPN, Orsay, France.
    Caldeira Balkeståhl, Li
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Calén, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Fransson, Kjell
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marciniewski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Schönning, Karin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Pettersson, Joachim
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zmeskal, Johann
    ÖAW, Wien, Austria.
    A new method for electron momentum reconstruction in the PANDA experiment2014In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 503, article id 012008Article in journal (Refereed)
    Abstract [en]

    The Kalman Filter in existing PANDARoot framework of experiment is not optimally suited for electrons, for which the highly non-Gaussian Bremsstrahlung process yields a tail in the momentum resolution distribution. A new method was therefore developed to improve the electron momentum reconstruction with an event by event procedure. The improvements of the electron momentum resolution will be shown. The interest of the method for the electromagnetic channels studies will also be presented.

  • 45. Maisonny, R.
    et al.
    Capron, M.
    Lattouf, E.
    Lawicki, A.
    Maclot, S.
    Bernigaud, V.
    Domaracka, A.
    Manil, B.
    Meacutery, A.
    Rangama, J.
    Legendre, S.
    Björneholm, Olle
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Surface and Interface Science.
    Svensson, S.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Surface and Interface Science.
    Rousseau, P.
    Huber, B. A.
    Adoui, L.
    Highly Charged Ion: Induced Water Cluster Fragmentation2012In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 388, no 10, p. 102053-Article in journal (Refereed)
    Abstract [en]

    Interaction between slow multiply charged ions and small to medium-size neutral water clusters is investigated. Strong projectile charge dependence is found for all of the fragmentation patterns. A variation of the projectile charge dramatically changes the proportion of multi-electron removal, the fragment kinetic energies as well as the mean size of the emitted fragments. First results for highly charged ion - water cluster ion collisions will also be presented.

  • 46.
    Martin, David
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Electronics.
    Enlund, Johannes
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Electronics.
    Kappertz, Oliver
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Electronics.
    Jensen, Jens
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Ion Physics.
    Comparing XPS and ToF-ERDA measurement of high-k dielectric materials2008In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 100, no 1, p. 012036-Article in journal (Refereed)
  • 47.
    Martin, David
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Electronics.
    Enlund, Johannes
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Electronics.
    Yantchev, Ventsislav
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Electronics.
    Olsson, Jörgen
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Electronics.
    Katardjiev, Ilia
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Electronics.
    Optimisation of a smooth multilayer Nickel Silicide surface for ALN growth2008In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 100, no 4, p. 042014-Article in journal (Refereed)
    Abstract [en]

    For use in thin film electroacoustic (TEA) technology a few hundred nanometrethick nickel silicide (NiSi) electrode would need to be fabricated. A complete fabrication process for the formation of over 200 nm thick silicide films has been optimised for use as an electroacoustic electrode. Optimisation of silicidation temperature and identification of the mono phase of silicide is demonstrated. Thick electrodes are formed by depositing multilayers of silicon and nickel pairs onto silicon (Si) substrates before rapid thermal annealing. The numbers of multilayers and relative material thicknesses are optimized for both surface roughness and electrical resistivity. The growth of textured aluminium nitride (AlN) has been investigated on the optimised surfaces.

  • 48.
    Martinez Osorio, Yeisson Fabian
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Theoretical Astrophysics.
    Barklem, Paul S.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Theoretical Astrophysics.
    Lind, K.
    Asplund, M.
    The influence of electron collisions on non-LTE Li line formation in stellar atmospheres2012In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 388, no 4, p. 042018-Article in journal (Refereed)
    Abstract [en]

    The influence of the uncertainties in the rate coefficient data for electron-impact excitation and ionization on non-LTE Li line formation in cool stellar atmospheres is investigated. We examine the electron collision data used in previous non-LTE calculations and compare them to our own calculations using the R-matrix with pseudostates (RMPS) method and to other calculations found in the literature.

  • 49. Mascolo, Matteo
    et al.
    Caldeira Balkeståhl, Li
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Höistad, Bo
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Redmer, Christoph
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Gamma-gamma physics at KLOE/KLOE-22012In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 349, no 1, p. 012014-Article in journal (Refereed)
  • 50.
    Mertens, Marius
    et al.
    JLU, Giessen, Germany.
    Caldeira Balkeståhl, Li
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Calén, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Fransson, Kjell
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marciniewski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Schönning, Karin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Pettersson, Joachim
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zmeskal, Johann
    ÖAW, Wien, Austria.
    Triplet based online track finding in the PANDA-STT2014In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 503, article id 012036Article in journal (Refereed)
    Abstract [en]

    The PANDA-Experiment at the future FAIR facility in Darmstadt will study antiproton-proton collisions in a fixed-target setup with a phase-space cooled antiproton beam with a momentum from 1.5 to 15 GeV/c at a nominal interaction rate of 2 · 107 s−1. The data acquisition of the detectors has to run in a triggerless mode and the physics events of interest are identified by an online event filter. Tracking information is a key input for the event filter to distinguish signal events from background. A variety of tracking algorithms is foreseen to process the different track topologies. The so-called Triplet Finder, which is presented here, is a track finding algorithm based on the central straw tube tracker (STT) of PANDA. The algorithm focuses on mathematical simplicity and robustness to allow an online processing of the incoming detector hits. The algorithm and results of a proof-of-concept implementation are presented.

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