The products of fusion reactions at JET are measured using different diagnostic techniques. One of the methods is based on measurements of gamma-rays, originating from reactions between fast ions and plasma impurities. During the forthcoming deuterium-tritium (DT) campaign a particular attention will be paid to 4.44 MeV gamma-rays emitted in the 9Be(α,nγ)12C reaction. Gamma-ray detectors foreseen for measurements in DT campaigns have to be able to register spectra at high count rates, up to approximately 500 kHz. For the Gamma-ray Camera at JET a new setup will be based on scintillators with a short decay time, e.g., CeBr3, and a multi-pixel photon counter (MPPC). We present two methods of output signal shortening in modules based on MPPC. A short detector output signal is necessary in order to minimize the number of pile up events at high count rates. One method uses a passive RC circuit with a pole zero cancellation, whereas an active transimpedance amplifier is used in the other one. Due to the strong dependence of MPPC properties on temperature variation, a special device MTCD@NCBJ was designed and produced to stabilize the gain in MPPC-based scintillation detectors. We show that this device guarantees stable working conditions.
Boltruczyk, G., Broslawski, A., Gosk, M., Korolczuk, S., Kwiatkowski, R., Linczuk, M., et al. (2017). Development of MPPC-based detectors for high count rate DT campaigns at JET. FUSION ENGINEERING AND DESIGN, 123, 940-944.
|Citazione:||Boltruczyk, G., Broslawski, A., Gosk, M., Korolczuk, S., Kwiatkowski, R., Linczuk, M., et al. (2017). Development of MPPC-based detectors for high count rate DT campaigns at JET. FUSION ENGINEERING AND DESIGN, 123, 940-944.|
|Tipo:||Articolo in rivista - Articolo scientifico|
|Carattere della pubblicazione:||Scientifica|
|Presenza di un coautore afferente ad Istituzioni straniere:||Si|
|Titolo:||Development of MPPC-based detectors for high count rate DT campaigns at JET|
|Autori:||Boltruczyk, G; Broslawski, A; Gosk, M; Korolczuk, S; Kwiatkowski, R; Linczuk, M; Urban, A; Bielecki, J; Costa Pereira, R; Fernandes, A; Figueiredo, J; Kiptily, V; Murari, A; Nocente, M; Perseo, V; Rigamonti, D; Santos, B; Tardocchi, M; Zychor, I|
TARDOCCHI, MARCO (Penultimo)
|Data di pubblicazione:||2017|
|Rivista:||FUSION ENGINEERING AND DESIGN|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1016/j.fusengdes.2017.03.040|
|Appare nelle tipologie:||01 - Articolo su rivista|