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

Dal Molin A.; Nocente M.; Dalla Rosa M.; Panontin E.; Rigamonti D.; Tardocchi M.; Shevelev A.; Khilkevitch E.; Iliasova M.; Giacomelli L.; Gorini G., Perelli Cippo E.; D’Isa F.; Pautasso G., Papp G., Tardini G.; Macusova E., Cerovsky J.; Ficker O.; Salewski M.; Kiptily V.; EUROfusion MST1 Team; COMPASS Team; ASDEX Upgrade Team

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.

ID 481629
DOI 10.1088/1361-6501/acd46c
PRODUCT TYPE Journal Article
LAST UPDATE 2023-06-19T10:03:20Z
TITLE Implementation of activities described in the Roadmap to Fusion during Horizon 2020 through a Joint programme of the members of the EUROfusion consortium