uu.seUppsala University Publications
Change search
Link to record
Permanent link

Direct link
BETA
Giacomelli, Luca
Alternative names
Publications (10 of 35) Show all publications
Andersson Sundén, E., Conroy, S., Ericsson, G., Gatu Johnson, M., Giacomelli, L., Hellesen, C., . . . Tardocchi, M. (2008). Evaluation of Spectral Unfolding for Neutron Spectroscopy. In: AIP Conference Proceedings 988 (pp. 315). .
Open this publication in new window or tab >>Evaluation of Spectral Unfolding for Neutron Spectroscopy
Show others...
2008 (English)In: AIP Conference Proceedings 988, 2008, 315- p.Conference paper, Published paper (Refereed)
Identifiers
urn:nbn:se:uu:diva-16773 (URN)
Note
International Workshop on Burning Plasma Diagnostics, September 2007, Varenna, ItalyAvailable from: 2008-06-05 Created: 2008-06-05 Last updated: 2017-01-25
Giacomelli, L., Hjalmarsson, A., Källne, J., Hellesen, C., Tardocchi, M., Goroni, G., . . . Weiszflog, M. (2008). Neutron Emission Spectroscopy Results for ITB and Mode Conversion ICRH Experiments at JET. In: Rev. Sci. Instr., submitted. .
Open this publication in new window or tab >>Neutron Emission Spectroscopy Results for ITB and Mode Conversion ICRH Experiments at JET
Show others...
2008 (English)In: Rev. Sci. Instr., submitted, 2008Conference paper, Published paper (Refereed)
Identifiers
urn:nbn:se:uu:diva-16765 (URN)
Note
17th Topical Conference High Temperature Plasma Diagnostics, May 2008, Albaquerque, New Mexico, USAAvailable from: 2008-06-05 Created: 2008-06-05 Last updated: 2017-01-25Bibliographically approved
Gatu Johnson, M., Giacomelli, L., Hjalmarsson, A., Källne, J., Weiszflog, M., Andersson Sundén, E., . . . Popovichev, S. (2008). The 2.5-MeV neutron time-of-flight spectrometer TOFOR for experiments at JET. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 591(2), 417-430.
Open this publication in new window or tab >>The 2.5-MeV neutron time-of-flight spectrometer TOFOR for experiments at JET
Show others...
2008 (English)In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 591, no 2, 417-430 p.Article in journal (Refereed) Published
Abstract [en]

A time-of-flight (TOF) spectrometer for measurement of the 2.5-MeV neutron emission from fusion plasmas has been developed and put into use at the JET tokamak. It has been optimized for operation at high rates (TOFOR) for the purpose of performing advanced neutron emission spectroscopy (NES) diagnosis of deuterium plasmas with a focus on the fuel ion motional states for different auxiliary heating scenarios. This requires operation over a large dynamic range, including high rates of > 100 kHz with a maximum value of 0.5 MHz for the TOFOR design. This paper describes the design principles and their technical realization. The performance is illustrated with recent neutron TOF spectra recorded for plasmas subjected to different heating scenarios. A true event count rate of 39 kHz has been achieved at about a tenth of the expected neutron yield limit of JET, giving a projected maximum of 400 kHz at peak JET plasma yield. This means that the count rate capability for NES diagnosis of D plasmas has been improved more than an order of magnitude. Another important performance factor is the spectrometer bandwidth, where data have been acquired and analyzed successfully with a response function for neutrons over the energy range 1 to > 5 MeV. The implications of instrumental advancement represented by TOFOR are discussed.

National Category
Physical Sciences Engineering and Technology
Identifiers
urn:nbn:se:uu:diva-16750 (URN)10.1016/j.nima.2008.03.010 (DOI)000257529700011 ()
Note

Conference Information: 21st IAEA Fusion Energy Conference Chengdu, PEOPLES R CHINA, OCT 16-21, 2006

Available from: 2008-06-05 Created: 2008-06-05 Last updated: 2017-12-08Bibliographically approved
Gatu Johnson, M., Giacomelli, L., Hjalmarsson, A., Weiszflog, M., Andersson Sundén, E., Conroy, S., . . . Tardocchi, M. (2008). The TOFOR Neutron Spectrometer for High Performance Measurements of D Plasma Fuel Ion Properties. In: AIP Conference Proceedings 988 (pp. 311). .
Open this publication in new window or tab >>The TOFOR Neutron Spectrometer for High Performance Measurements of D Plasma Fuel Ion Properties
Show others...
2008 (English)In: AIP Conference Proceedings 988, 2008, 311- p.Conference paper, Published paper (Refereed)
Identifiers
urn:nbn:se:uu:diva-16772 (URN)
Note
International Workshop on Burning Plasma Diagnostics, September 2007, Varenna, ItalyAvailable from: 2008-06-05 Created: 2008-06-05 Last updated: 2017-01-25
Hellesen, C., Andersson Sundén, E., Conroy, S., Ericsson, G., Giacomelli, L., Hjalmarsson, A., . . . Voitsekovitch, I. (2008). Validation of TRANSP Simulations Using Neutron emission Spectroscopy with Dual Sight Lines. Review of Scientific Instruments, 79(10), 10E510.
Open this publication in new window or tab >>Validation of TRANSP Simulations Using Neutron emission Spectroscopy with Dual Sight Lines
Show others...
2008 (English)In: Review of Scientific Instruments, ISSN 0034-6748, E-ISSN 1089-7623, Vol. 79, no 10, 10E510- p.Article in journal (Refereed) Published
Abstract [en]

A method to generate modeled neutron spectra from bulk and fast ion distributions simulated by TRANSP has been developed. In this paper, modeled data generated from fuel ion distrubutions modeled with TRANSP is compared to measured data from two neutron spectrometers with different lines of sight; TOFOR with a radial one and the MPRu with a tangential one. The information obtained from the analysis of the measured neutron spectra such as the relative intensity of the emission from different ion populations places additional constraints on the simulation and can be used to adjust the parameters of the simulation.

National Category
Physical Sciences
Identifiers
urn:nbn:se:uu:diva-16754 (URN)10.1063/1.2965017 (DOI)000260573500092 ()
Note
JET-EFDA contributors. 17th Topical Conference High Temperature Plasma Diagnostics, May 2008, Albaquerque, New Mexico, USAAvailable from: 2008-06-05 Created: 2008-06-05 Last updated: 2017-12-08Bibliographically approved
Giacomelli, L., Hellesen, C., Hjalmarsson, A., Sjöstrand, H., Källne, J., Conroy, S., . . . Weiszflog, M. (2007). Characterization of Phoswich Scintillation Detectors for the Focal Plane Hodoscope of Magnetic Proton Recoil Spectrometers for Fusion Neutrons. .
Open this publication in new window or tab >>Characterization of Phoswich Scintillation Detectors for the Focal Plane Hodoscope of Magnetic Proton Recoil Spectrometers for Fusion Neutrons
Show others...
2007 (English)Report (Other (popular scientific, debate etc.))
Identifiers
urn:nbn:se:uu:diva-13740 (URN)
Note
and JET EFDA contributors EFD-P(07)16Available from: 2008-06-05 Created: 2008-06-05 Last updated: 2017-01-25
Andersson Sundén, E., Conroy, S., Ericsson, G., Gatu Johnson, M., Giacomelli, L., Hellesen, C., . . . Tardocchi, M. (2007). Evaluation of Spectral Unfolding for Neutron Spectroscopy. .
Open this publication in new window or tab >>Evaluation of Spectral Unfolding for Neutron Spectroscopy
Show others...
2007 (English)Report (Other (popular scientific, debate etc.))
Identifiers
urn:nbn:se:uu:diva-13737 (URN)
Note
and JET EFDA contributors (EFD -C(07)04/10)Available from: 2008-06-05 Created: 2008-06-05 Last updated: 2017-01-25
Sjöstrand, H., Andersson Sundén, E., Bertalot, L., Conroy, S., Ericsson, G., Gatu Johnson, M., . . . Tardocchi, M. (2007). Fusion Power Measurements using a Combined Neutron Spectrometer- Camera at JET. .
Open this publication in new window or tab >>Fusion Power Measurements using a Combined Neutron Spectrometer- Camera at JET
Show others...
2007 (English)Report (Other (popular scientific, debate etc.))
Identifiers
urn:nbn:se:uu:diva-13738 (URN)
Note
and JET EFDA contributors (EFD-P(07)35)Available from: 2008-06-05 Created: 2008-06-05 Last updated: 2017-01-25
Sjöstrand, H., Andersson Sundén, E., Conroy, S., Ericsson, G., Gatu Johnson, M., Giacomelli, L., . . . Weiszflog, M. (2007). Fusion Power Measurements Using a combined Neutron Spectrometer-Camera System at ITER. .
Open this publication in new window or tab >>Fusion Power Measurements Using a combined Neutron Spectrometer-Camera System at ITER
Show others...
2007 (English)Report (Other (popular science, discussion, etc.))
Series
(EFD-C(07)04/03)
National Category
Engineering and Technology
Identifiers
urn:nbn:se:uu:diva-13731 (URN)
Note

and JET EFDA contributors

Available from: 2008-06-05 Created: 2008-06-05 Last updated: 2017-01-25Bibliographically approved
Krasilnikov, A., van Eester, D., Lerche, E., Ongena, J., Mailloux, J., Stamp, M., . . . Goncharov, P. (2007). ICRH of JET and LHD Majority Ions at their Fundamental Cyclotron Frequency. In: AIP Conference Proceedings 933 (pp. 43). .
Open this publication in new window or tab >>ICRH of JET and LHD Majority Ions at their Fundamental Cyclotron Frequency
Show others...
2007 (English)In: AIP Conference Proceedings 933, 2007, 43- p.Conference paper, Published paper (Other (popular scientific, debate etc.))
Identifiers
urn:nbn:se:uu:diva-16784 (URN)
Note
17th Topical Conference on Radio Frequency Power in Plasmas. May 2007, Clearwater, Florida, USAAvailable from: 2008-06-05 Created: 2008-06-05
Organisations

Search in DiVA

Show all publications