10.5286/ISIS.E.RB2000138
Dr Enrico Perelli Cippo
Dr Marica Rebai
Dr Anna Fedrigo
Dr Davide Rigamonti
Dr Marco Tardocchi
Dr Luca Giacomelli
Mr Oscar Putignano
Tomographic reconstruction of the shape and dimensions of LaBr3 scintillator crystals at IMAT
ISIS Facility
2020
STFC ISIS Neutron and Muon Data
A recent project has started to provide JET (and in the future ITER tokamak) of a second real time diagnostic for fusion power, measuring the absolute intensity of the 16.7 MeV gamma line from D-T reaction. This diagnostic requires ABSOLUTE EFFICIENCY calibration of the used detector, and thus accurate measurement of the detector sensitive volume. LaBr3 detectors are the best option for high-energy gamma-ray monitoring in neutron-rich environments, but they are provided in sealed mounts that cannot be open without damage. We thus propose to perform a Neutron Tomography measurements of two such sealed detectors. One of them is a "one-of-its-kind" very large (3"x6") detector that will be made available by JET tokamak for a limited amount of time. NT will provide the exact crystal dimensions to be inserted in GEANT4-MCNP simulations for the efficiency estimation.