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Gustafsson, Leif
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Publications (10 of 30) Show all publications
Aziz, I., Dancila, D., Dittmeier, S., Siligaris, A., Dehos, C., De Lurgio, P. M., . . . Brenner, R. (2019). Effects of proton irradiation on 60 GHz CMOS transceiver chip for multi-Gbps communication in high-energy physics experiments. The Journal of Engineering (8), 5391-5396
Open this publication in new window or tab >>Effects of proton irradiation on 60 GHz CMOS transceiver chip for multi-Gbps communication in high-energy physics experiments
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2019 (English)In: The Journal of Engineering, ISSN 1872-3284, E-ISSN 2051-3305, no 8, p. 5391-5396Article in journal (Refereed) Published
Abstract [en]

This article presents the experimental results of 17 MeV proton irradiation on a 60 GHz low power, half-duplex transceiver (TRX) chip implemented in 65 nm CMOS technology. It supports short range point-to-point data rate up to 6 Gbps by employing on-off keying (OOK). To investigate the irradiation hardness for high-energy physics (HEP) applications, two TRX chips were irradiated with total ionising doses (TID) of 74 and 42 kGy and fluence of 1.4 x 10(14)N(eq)/cm(2) and 0.8 x 10(14)N(eq)/cm(2) for RX and TX modes, respectively. The chips were characterised by pre- and post-irradiation analogue voltage measurements on different circuit blocks as well as through the analysis of wireless transmission parameters like bit error rate (BER), eye diagram, jitter etc. Post-irradiation measurements have shown certain reduction in performance but both TRX chips have been found operational through over the air measurements at 5 Gbps. Moreover, very small shift in the carrier frequency was observed after the irradiation.

Place, publisher, year, edition, pages
INST ENGINEERING TECHNOLOGY-IET, 2019
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:uu:diva-393829 (URN)10.1049/joe.2018.5402 (DOI)000482435600005 ()
Available from: 2019-10-01 Created: 2019-10-01 Last updated: 2019-10-01Bibliographically approved
Aartsen, M. G., Ackermann, M., Adams, J., Aguilar, J. A., Ahlers, M., Ahrens, M., . . . Zoll, M. (2017). The IceCube Neutrino Observatory: instrumentation and online systems. Journal of Instrumentation, 12, Article ID P03012.
Open this publication in new window or tab >>The IceCube Neutrino Observatory: instrumentation and online systems
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2017 (English)In: Journal of Instrumentation, ISSN 1748-0221, E-ISSN 1748-0221, Vol. 12, article id P03012Article in journal (Refereed) Published
Abstract [en]

The IceCube Neutrino Observatory is a cubic-kilometer-scale high-energy neutrino detector built into the ice at the South Pole. Construction of IceCube, the largest neutrino detector built to date, was completed in 2011 and enabled the discovery of high-energy astrophysical neutrinos. We describe here the design, production, and calibration of the IceCube digital optical module (DOM), the cable systems, computing hardware, and our methodology for drilling and deployment. We also describe the online triggering and data filtering systems that select candidate neutrino and cosmic ray events for analysis. Due to a rigorous pre-deployment protocol, 98.4% of the DOMs in the deep ice are operating and collecting data. IceCube routinely achieves a detector uptime of 99% by emphasizing software stability and monitoring. Detector operations have been stable since construction was completed, and the detector is expected to operate at least until the end of the next decade.

Place, publisher, year, edition, pages
IOP PUBLISHING LTD, 2017
Keywords
Large detector systems for particle and astroparticle physics, Neutrino detectors, Online farms and online filtering, Trigger concepts and systems (hardware and software)
National Category
Subatomic Physics Accelerator Physics and Instrumentation
Identifiers
urn:nbn:se:uu:diva-359268 (URN)10.1088/1748-0221/12/03/P03012 (DOI)000406997600012 ()
Funder
Swedish Research CouncilSwedish National Infrastructure for Computing (SNIC)Knut and Alice Wallenberg FoundationGerman Research Foundation (DFG)Australian Research Council
Available from: 2018-09-06 Created: 2018-09-06 Last updated: 2019-05-21Bibliographically approved
Dittmeier, S., Brenner, R., Dancila, D., Gustafsson, L., Rydberg, A. & Yang, S. (2017). Wireless data transmission for high energy physics applications. Paper presented at Connecting The Dots/Intelligent Trackers 2017 - EPJ Web. EPJ Web of Conferences, 150, Article ID 00002.
Open this publication in new window or tab >>Wireless data transmission for high energy physics applications
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2017 (English)In: EPJ Web of Conferences, ISSN 2101-6275, E-ISSN 2100-014X, Vol. 150, article id 00002Article in journal (Refereed) Published
Abstract [en]

Silicon tracking detectors operated at high luminosity collider experiments pose a challenge for current and future readout systems regarding bandwidth, radiation, space and power constraints. With the latest developments in wireless communications, wireless readout systems might be an attractive alternative to commonly used wired optical and copper based readout architectures.

The WADAPT group (Wireless Allowing Data and Power Transmission) has been formed to study the feasibility of wireless data transmission for future tracking detectors. These proceedings cover current developments focused on communication in the 60 GHz band. This frequency band offers a high bandwidth, a small form factor and an already mature technology. Motivation for wireless data transmission for high energy physics application and the developments towards a demonstrator prototype are summarized. Feasibility studies concerning the construction and operation of a wireless transceiver system have been performed. Data transmission tests with a transceiver prototype operating at even higher frequencies in the 240 GHz band are described. Data transmission at rates up to 10 Gb/s have been obtained successfully using binary phase shift keying.

National Category
Communication Systems
Research subject
Engineering Science with specialization in Microwave Technology
Identifiers
urn:nbn:se:uu:diva-336088 (URN)10.1051/epjconf/201715000002 (DOI)000426612900002 ()
Conference
Connecting The Dots/Intelligent Trackers 2017 - EPJ Web
Available from: 2017-12-12 Created: 2017-12-12 Last updated: 2018-06-12Bibliographically approved
Barwick, S. W., Berg, E. C., Besson, D. Z., Binder, G., Binns, W. R., Boersma, D. J., . . . Young, R. (2015). A first search for cosmogenic neutrinos with the ARIANNA Hexagonal Radio Array. Astroparticle physics, 70, 12-26
Open this publication in new window or tab >>A first search for cosmogenic neutrinos with the ARIANNA Hexagonal Radio Array
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2015 (English)In: Astroparticle physics, ISSN 0927-6505, E-ISSN 1873-2852, Vol. 70, p. 12-26Article in journal (Refereed) Published
Abstract [en]

The ARIANNA experiment seeks to observe the diffuse flux of neutrinos in the 10(8)-10(10) GeV energy range using a grid of radio detectors at the surface of the Ross Ice Shelf of Antarctica. The detector measures the coherent Cherenkov radiation produced at radio frequencies, from about 100 MHz-1 GHz, by charged particle showers generated by neutrino interactions in the ice. The ARIANNA Hexagonal Radio Array (HRA) is being constructed as a prototype for the full array. During the 2013-14 austral summer, three HRA stations collected radio data which was wirelessly transmitted off site in nearly real-time. The performance of these stations is described and a simple analysis to search for neutrino signals is presented. The analysis employs a set of three cuts that reject background triggers while preserving 90% of simulated cosmogenic neutrino triggers. No neutrino candidates are found in the data and a model-independent 90% confidence level Neyman upper limit is placed on the all flavor nu + (nu) over bar flux in a sliding decade-wide energy bin. The limit reaches a minimum of 1.9 x 10(-23) GeV-1 cm(-2) s(-1) sr(-1) in the 10(8.5)-10(9.5) GeV energy bin. Simulations of the performance of the full detector are also described. The sensitivity of the full ARIANNA experiment is presented and compared with current neutrino flux models.

Keywords
Radio, Antarctica, Neutrino, Cosmogenic, GZK, High energy
National Category
Physical Sciences
Identifiers
urn:nbn:se:uu:diva-258734 (URN)10.1016/j.astropartphys.2015.04.002 (DOI)000356755400002 ()
Available from: 2015-07-21 Created: 2015-07-20 Last updated: 2017-12-04Bibliographically approved
Pelikan, D., Bingefors, N., Brenner, R., Dancila, D. & Gustafsson, L. (2014). Wireless data transfer with mm-waves for future tracking detectors. In: : . Paper presented at Workshop on Intelligent Trackers (WIT2014), University of Pennsylvania, 14-16 May.
Open this publication in new window or tab >>Wireless data transfer with mm-waves for future tracking detectors
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2014 (English)Conference paper, Oral presentation with published abstract (Refereed)
Abstract [en]

Wireless data transfer has revolutionized the consumer market for the last decade generating many products equipped with transmitters and receivers for wireless data transfer. Wireless technology opens attractive possibilities for data transfer in future tracking detectors. The reduction of wires and connectors for data links is certainly beneficial both for the material budget and the reliability of the system. An advantage of wireless data transfer is the freedom of routing signals which today is particularly complicated when bringing the data the first 50 cm out of the tracker. With wireless links intelligence can be built into a tracker by introducing communication between tracking layers within a region of interest which would allow the construction of track primitives in real time. The wireless technology used in consumer products is however not suitable for tracker readouts. The low data transfer capacity of current 5 GHz transceivers and the relatively large feature sizes of the components is a disadvantage. Due to the requirement of high data rates in tracking detectors high bandwidth is required. The frequency band around 60 GHz turns out to be a very promising candidate for data transfer in a detector system. The high baseband frequency allows for data transfer in the order of several Gbit/s. Due to the small wavelength in the mm range only small structures are needed for the transmitting and receiving electronics. The 60 GHz frequency band is a strong candidate for future WLAN applications hence components are already starting to be available on the market. Patch antennas produced on flexible Printed Circuit Board substrate that can be used for wireless communication in future trackers are presented in this article. The antennas can be connected to transceivers for data transmission/reception or be connected by wave-guides to structures capable of bringing the 60 GHz signal behind boundaries. Results on simulation and fabrication of these antennas are presented as well as studies on the sensitivity of production tolerances.

Keywords
Particle tracking detectors, Front-end electronics for detector readout, Data acquisition concepts, Manufacturing
National Category
Accelerator Physics and Instrumentation Engineering and Technology
Identifiers
urn:nbn:se:uu:diva-289137 (URN)
Conference
Workshop on Intelligent Trackers (WIT2014), University of Pennsylvania, 14-16 May
Available from: 2016-04-29 Created: 2016-04-29 Last updated: 2016-04-29
Pelikan, D., Bingefors, N., Brenner, R., Dancila, D. & Gustafsson, L. (2014). Wireless data transfer with mm-waves for future tracking detectors. Journal of Instrumentation, 9, C11008
Open this publication in new window or tab >>Wireless data transfer with mm-waves for future tracking detectors
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2014 (English)In: Journal of Instrumentation, ISSN 1748-0221, E-ISSN 1748-0221, Vol. 9, p. C11008-Article in journal (Refereed) Published
Abstract [en]

Wireless data transfer has revolutionized the consumer market for the last decade generating many products equipped with transmitters and receivers for wireless data transfer. Wireless technology opens attractive possibilities for data transfer in future tracking detectors. The reduction of wires and connectors for data links is certainly beneficial both for the material budget and the reliability of the system. An advantage of wireless data transfer is the freedom of routing signals which today is particularly complicated when bringing the data the first 50 cm out of the tracker. With wireless links intelligence can be built into a tracker by introducing communication between tracking layers within a region of interest which would allow the construction of track primitives in real time. The wireless technology used in consumer products is however not suitable for tracker readouts. The low data transfer capacity of current 5 GHz transceivers and the relatively large feature sizes of the components is a disadvantage. Due to the requirement of high data rates in tracking detectors high bandwidth is required. The frequency band around 60 GHz turns out to be a very promising candidate for data transfer in a detector system. The high baseband frequency allows for data transfer in the order of several Gbit/s. Due to the small wavelength in the mm range only small structures are needed for the transmitting and receiving electronics. The 60 GHz frequency band is a strong candidate for future WLAN applications hence components are already starting to be available on the market. Patch antennas produced on flexible Printed Circuit Board substrate that can be used for wireless communication in future trackers are presented in this article. The antennas can be connected to transceivers for data transmission/reception or be connected by wave-guides to structures capable of bringing the 60 GHz signal behind boundaries. Results on simulation and fabrication of these antennas are presented as well as studies on the sensitivity of production tolerances.

Keywords
Particle tracking detectors, Front-end electronics for detector readout, Data acquisition concepts, Manufacturing
National Category
Accelerator Physics and Instrumentation Engineering and Technology
Identifiers
urn:nbn:se:uu:diva-240001 (URN)10.1088/1748-0221/9/11/C11008 (DOI)000345026000008 ()
Available from: 2015-01-05 Created: 2015-01-05 Last updated: 2017-12-05Bibliographically approved
Skorodko, T., Bashkanov, M., Bogoslawsky, D., Calén, H., Clement, H., Doroshkevich, E., . . . Zlomanczuk, J. (2011). Exclusive measurement of the pp -> nn pi(+)pi(+) reaction at 1.1 GeV. European Physical Journal A, 47(9), 108
Open this publication in new window or tab >>Exclusive measurement of the pp -> nn pi(+)pi(+) reaction at 1.1 GeV
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2011 (English)In: European Physical Journal A, ISSN 1434-6001, E-ISSN 1434-601X, Vol. 47, no 9, p. 108-Article in journal (Refereed) Published
Abstract [en]

First exclusive data for the pp -> nnp(+)pi(+) reaction have been obtained at CELSIUS with the WASA detector setup at a beam energy of T(p) - 1.1 GeV. Total and differential cross-sections disagree with theoretical calculations, which predict the Delta Delta excitation to be the dominant process at this beam energy. Instead, the data require the excitation of one of the nucleons to a higher-lying Delta state, preferably the Delta(1600)P(33), to be the leading process.

National Category
Physical Sciences
Identifiers
urn:nbn:se:uu:diva-162716 (URN)10.1140/epja/i2011-11108-2 (DOI)000296632400009 ()
Available from: 2011-12-05 Created: 2011-12-05 Last updated: 2017-12-08Bibliographically approved
Skorodko, T., Bashkanov, M., Bogoslawsky, D., Calèn, H., Clement, H., Doroshkevich, E., . . . Zlomanczuk, J. (2009). Two-pion production in proton-proton collisions: experimental total cross sections and their isospin decomposition. Physics Letters B, 679(1), 30-35
Open this publication in new window or tab >>Two-pion production in proton-proton collisions: experimental total cross sections and their isospin decomposition
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2009 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 679, no 1, p. 30-35Article in journal (Refereed) Published
Abstract [en]

The two-pion production in pp-collisions has been investigated at CELSIUS in exclusive measurements from threshold up to T-P = 1.36 GeV. Total and differential Cross sections have been obtained for the channels pn pi(+)pi(0), pp pi(+)pi(-), pp pi(0)pi(0) and also nn pi(+)pi(+). For intermediate incident energies T-P > 1GeV, i.e. in the region which is beyond the Roper excitation but at the onset of Delta Delta excitation, the total pp pi(0)pi(0) cross section falls behind theoretical predictions by as much as all order of magnitude near 1.2 GeV, whereas the nn pi(+)pi(+) cross section is a factor of five larger than predicted. An isospin decomposition of the total cross sections exhibits a s-channel-like energy dependence in the region of the Roper excitation as well as a significant contribution of an isospin 3/2 resonance other than the Delta(1232). As possible candidates the Delta(1600) and the Delta(1700) are discussed. (C) 2009 Elsevier B.V. All rights reserved.

National Category
Physical Sciences
Identifiers
urn:nbn:se:uu:diva-128282 (URN)10.1016/j.physletb.2009.07.012 (DOI)000269299900007 ()
Available from: 2010-07-21 Created: 2010-07-20 Last updated: 2017-12-12Bibliographically approved
Bashkanov, M., Calèn, H., Cappellaro, F., Ekström, C., Fransson, K., Gustafsson, L., . . . Zlomanczuk, J. (2007). Low-mass pi pi enhancement in baryonic pi pi production: ABC effect revised by exclusive measurements. International Journal of Modern Physics A, 22(2-3), 625-628
Open this publication in new window or tab >>Low-mass pi pi enhancement in baryonic pi pi production: ABC effect revised by exclusive measurements
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2007 (English)In: International Journal of Modern Physics A, ISSN 0217-751X, E-ISSN 1793-656X, Vol. 22, no 2-3, p. 625-628Article in journal (Refereed) Published
Abstract [en]

The ABC effect - a puzzling threshold enhancement in the ππ invariant mass spectrum of double-pionic fusion to nuclear bound states - has been investigated since 40 years by inclusive measurements without providing a conclusive interpretation. First exclusive measurements to this topic have now been carried out at CELSIUS-WASA. They confirm a huge ππ threshold enhancement, prove it to be of scalar-isoscalar nature, i.e., a σ-channel phenomenon and reveal the theoretically predicted high-mass enhancement in inclusive spectra to be of πππ rather than of ππ nature - falsifying thus corresponding model predictions for the ABC effect. From the kinematically complete data samples we infer that the interaction between the two Δ particles created in this process is of crucial importance.

Keywords
ABC effect, σ channel enhancement, ∆∆ interaction, medium effects
National Category
Physical Sciences
Identifiers
urn:nbn:se:uu:diva-16890 (URN)10.1142/S0217751X07035987 (DOI)000250926800065 ()
Available from: 2008-06-16 Created: 2008-06-16 Last updated: 2017-12-08Bibliographically approved
Bashkanov, M., Bogoslawsky, D., Calén, H., Capellaro, F., Clement, H., Demirörs, L., . . . Zlomanczuk, J. (2007). Measurement of the slope parameter for the η → 3π0 decay in the pp → ppη reaction. Physical Review C. Nuclear Physics, 76(4), 048201
Open this publication in new window or tab >>Measurement of the slope parameter for the η → 3π0 decay in the pp → ppη reaction
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2007 (English)In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 76, no 4, p. 048201-Article in journal (Refereed) Published
Abstract [en]

The CELSIUS-WASA setup is used to measure the 3π0 decay of η mesons produced in pp interactions with beam kinetic energies of 1.36 and 1.45 GeV. The efficiency-corrected Dalitz plot and density distributions for this decay are shown, together with a fit of the quadratic slope parameter α yielding α = −0.026 ± 0.010(stat) ± 0.010(syst). This value is compared to recent experimental results and theoretical predictions.

National Category
Physical Sciences
Identifiers
urn:nbn:se:uu:diva-16829 (URN)10.1103/PhysRevC.76.048201 (DOI)000250620900091 ()
Available from: 2008-06-16 Created: 2008-06-16 Last updated: 2017-12-08Bibliographically approved
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