A new hard x-ray spectrometer for runaway electron measurements in tokamaks

0584062 - ÚFP 2024 RIV US eng J - Journal Article
Dal Molin, A. - Nocente, M. - Dalla Rosa, M. - Panontin, E. - Rigamonti, M. - Tardocchi, M. - Shevelev, A. - Khilkevitch, E. - Iliasova, M. - Giacomelli, L. - Gorini, G. - Perelli Cippo, E. - D’Isa, F. - Pautasso, G. - Papp, G. - Tardini, G. - Tomešová, Eva - Čeřovský, Jaroslav - Ficker, Ondřej - Salewski, M. - Kiptily, V.
A new hard x-ray spectrometer for runaway electron measurements in tokamaks.
Measurement Science and Technology. Roč. 34, č. 8 (2023), č. článku 085501. ISSN 0957-0233. E-ISSN 1361-6501
EU Projects: European Commission(XE) 633053 - EUROfusion
Institutional support: RVO:61389021
Keywords : nuclear instruments and methods for hot plasma diagnostics * runaway electrons * x-ray detectors
OECD category: Fluids and plasma physics (including surface physics)
Impact factor: 2.4, year: 2022
Method of publishing: Open access
https://iopscience.iop.org/article/10.1088/1361-6501/acd46c

Runaway electron gamma-ray detection system, a novel hard x-ray (HXR) spectrometer optimized for bremsstrahlung radiation measurement from runaway electrons in fusion plasmas, has been developed. The detector is based on a 1‘×1’ LaBr3:Ce scintillator crystal coupled with a photomultiplier tube. The system has an energy dynamic range exceeding 20 MeV with an energy resolution of 3% at 661.7 keV. The detector gain is stable even under severe loads, with a gain shift that stays below 3% at HXR counting rates in excess of 1 MCps. The performance of the system enables unprecedented studies of the time-dependent runaway electron energy distribution function, as shown in recent runaway electron physics experiments at the ASDEX Upgrade and COMPASS tokamaks.
Permanent Link: https://hdl.handle.net/11104/0352069