Darmstadt 2016 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 54: Instrumentation XV
HK 54.6: Vortrag
Donnerstag, 17. März 2016, 15:15–15:30, S1/01 A2
Background Suppression by Pulse Shape Discrimination in the CALIFA Calorimeter — •Benjamin Heiss, Roman Gernhäuser, Philipp Klenze, Patrick Remmels, and Max Winkel for the R3B collaboration — Technische Universtät München
The 4π-calorimeter CALIFA is one of the major detectors of the R3B-experiment at the upcoming Facility for Antiproton and Ion Research (FAIR) in Darmstadt. This calorimeter with 2464 CsI(Tl) crystals and 96 Phoswich detectors (LaBr3(Ce) and LaCl3(Ce)) plays a major role in the realization of kinematically complete measurements. General demands on CALIFA are a high efficiency, good energy resolution of about 5 % at 1 MeV γ energies and a large dynamic range, allowing a simultaneous measurement of γ-rays at E > 100 keV and scattered protons up to E < 700 MeV. Due to the very high energies of the light charged particles at the relativistic beam energies, especially in the forward direction of CALIFA, a significant fraction triggers nuclear reactions in the detector material. This talk will present the methods of the background suppression by pulse shape discrimination based on an experiment with protons at kinetic energies up to E = 480 MeV at the TRIUMF Laboratory in Vancouver, Canada. Supported by BMBF(05P12 WOFNF,05P15 WOFNA) and TRIUMF Vancouver.