In forthcoming deuterium-tritium (DT) experiments on JET a significant population of alpha-particles will be produced. For operating alpha-particle diagnostics at high DT neutron fluxes, specific improvements have to be made. Proposed new detectors for gamma-ray measurements will be based on CeBr3 and LaBr3:Ce scintillators. They are characterized by a good energy resolution, a relatively high detection efficiency for a few MeV gamma-rays and a fast response time. An overview of scintillator parameters is presented. A description of the properties of photodetectors is given to indicate optimal setups. Results of measurements, using gamma-ray sources with energies up to a few MeV, are discussed with relation to the DT campaign requirements.
Zychor, I., Boltruczyk, G., Burakowska, A., Craciunescu, T., Fernandes, A., Figueiredo, J., et al. (2016). High performance detectors for upgraded gamma ray diagnostics for JET DT campaigns. PHYSICA SCRIPTA, 91(6) [10.1088/0031-8949/91/6/064003].
High performance detectors for upgraded gamma ray diagnostics for JET DT campaigns
GORINI, GIUSEPPE;NOCENTE, MASSIMO;RIGAMONTI, DAVIDE;TARDOCCHI, MARCO;
2016
Abstract
In forthcoming deuterium-tritium (DT) experiments on JET a significant population of alpha-particles will be produced. For operating alpha-particle diagnostics at high DT neutron fluxes, specific improvements have to be made. Proposed new detectors for gamma-ray measurements will be based on CeBr3 and LaBr3:Ce scintillators. They are characterized by a good energy resolution, a relatively high detection efficiency for a few MeV gamma-rays and a fast response time. An overview of scintillator parameters is presented. A description of the properties of photodetectors is given to indicate optimal setups. Results of measurements, using gamma-ray sources with energies up to a few MeV, are discussed with relation to the DT campaign requirements.
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