Contributo in atti di convegno, 2019, ENG

Development of gamma-ray spectrometers optimized for runaway electron bremsstrahlung emission in fusion devices

Dal Molin A.; Nocente M.; Panontin E.; Rigamonti D.; Tardocchi M.; Shevelev A.; Khilkevitch E.; Iliasova M.; Giacomelli L.; Gorini G.; Pautasso G.; Papp G.; Tardini G.; EUROfusion MST1 Team; ASDEX Upgrade Team

Dipartimento di Fisica Università degli Studi di Milano-Bicocca, Milano, Italy; CNR ISTP, Istituto per la Scienza e Tecnologia dei Plasmi, Milano, Italy; IOFFE Physical Technical Institute, Saint Petersburg, Russia; Max-Planck-Intitut fuer Plasmaphysik, Garching bei Muenchen, Germany.

An optimized hard X-ray (HRX) spectrometer was designed to collect information from Bremsstrahlung emission in the MeV range runaway electrons (RE) generated during disruptions. The detector is based on a cerium doped lanthanum bromide scintillator crystal (LaBr3:Ce) coupled with a photomultiplier tube. The diagnostic allows for measurements of high hard X-ray fluxes in excess of 1 MHz with a wide dynamic range up to 20 MeV. The diagnostic was tested at the tokamak ASDEX Upgrade. The results achieved are promising and suggest the possibility of inferring information on the runaway electron energy distribution in tokamaks using deconvolution techniques.

46th EPS Conference on Plasma Physics, pp. 1–4, Milano, Italy, 8-12 July 2019

Keywords

gamma-ray spectrometers, runaway electron bremsstrahlung emission, fusion devices

CNR authors

Rigamonti Davide, Gorini Giuseppe, Giacomelli Luca Carlo, Tardocchi Marco

CNR institutes

IFP – Istituto di fisica del plasma "Piero Caldirola", ISTP – Istituto per la Scienza e Tecnologia dei Plasmi