A fast neutron detection system suitable for high rate measurements is presented. The detector is based on a commercial high purity single crystal diamond (SDD) coupled to a fast digital data acquisition system. The detector was tested at the ISIS pulsed spallation neutron source. The SDD event signal was digitized at 1 GHz to reconstruct the deposited energy (pulse amplitude) and neutron arrival time; the event time of flight (ToF) was obtained relative to the recorded proton beam signal t0. Fast acquisition is needed since the peak count rate is very high (~800 kHz) due to the pulsed structure of the neutron beam. Measurements at ISIS indicate that three characteristics regions exist in the biparametric spectrum: i) background gamma events of low pulse amplitudes; ii) low pulse amplitude neutron events in the energy range Edep = 1.5-7 MeV ascribed to neutron elastic scattering on 12C; iii) large pulse amplitude neutron events with En < 7 MeV ascribed to 12C(n,α)9Be and 12C(n,n')3α.

Giacomelli, L., Rebai, M., Perelli Cippo, E., Tardocchi, M., Fazzi, A., Andreani, C., et al. (2012). Diamond detector for high rate monitors of fast neutrons beams. In J. Källne, D. Ryutov, G. Gorini, C. Sozzi, M. Tardocchi (a cura di), Fusion for neutrons and subcritical nuclear fission: proceedings of the International Conference (pp. 305-310). AIP [10.1063/1.4706884].

Diamond detector for high rate monitors of fast neutrons beams

GIACOMELLI, LUIGI;ANDREANI, CARLA;PIETROPAOLO, ANTONINO;
2012-01-01

Abstract

A fast neutron detection system suitable for high rate measurements is presented. The detector is based on a commercial high purity single crystal diamond (SDD) coupled to a fast digital data acquisition system. The detector was tested at the ISIS pulsed spallation neutron source. The SDD event signal was digitized at 1 GHz to reconstruct the deposited energy (pulse amplitude) and neutron arrival time; the event time of flight (ToF) was obtained relative to the recorded proton beam signal t0. Fast acquisition is needed since the peak count rate is very high (~800 kHz) due to the pulsed structure of the neutron beam. Measurements at ISIS indicate that three characteristics regions exist in the biparametric spectrum: i) background gamma events of low pulse amplitudes; ii) low pulse amplitude neutron events in the energy range Edep = 1.5-7 MeV ascribed to neutron elastic scattering on 12C; iii) large pulse amplitude neutron events with En < 7 MeV ascribed to 12C(n,α)9Be and 12C(n,n')3α.
2012
Settore FIS/01 - FISICA SPERIMENTALE
English
Rilevanza internazionale
Capitolo o saggio
Giacomelli, L., Rebai, M., Perelli Cippo, E., Tardocchi, M., Fazzi, A., Andreani, C., et al. (2012). Diamond detector for high rate monitors of fast neutrons beams. In J. Källne, D. Ryutov, G. Gorini, C. Sozzi, M. Tardocchi (a cura di), Fusion for neutrons and subcritical nuclear fission: proceedings of the International Conference (pp. 305-310). AIP [10.1063/1.4706884].
Giacomelli, L; Rebai, M; Perelli Cippo, E; Tardocchi, M; Fazzi, A; Andreani, C; Pietropaolo, A; Frost, C; Rhodes, N; Schooneveld, E; Gorini, G...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/88007
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