Dresden 2013 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 38: Instrumentation
HK 38.7: Vortrag
Dienstag, 5. März 2013, 15:30–15:45, WIL-C207
Forward End-Cap for CALIFA — •Tudi Le Bleis, Michael Bendel, Roman Gernhaeuser, and Max Winkel — E12, T.U. Muenchen, James-Franck-str. 1, 85748 Garching bei Muenchen
CALIFA is the γ-rays and high energy particles detector for the R3B setup at FAIR. Due to the different reactions considered at R3B, CALIFA has to be able to detect and identify a broad range of γ-rays (from a few 100keV to about 20MeV) as well as recoil and knocked-out protons, deuterons, alphas and neutrons.
CALIFA is composed of two pieces: a barrel that surrounds the beam axis and the reaction target ; and an End-Cap that closes the barrel in the forward direction. The barrel composed of about 2000 long CsI crystals read-out by Large-Area APDs read out by a fully digital system.
The End-Cap covers from small polar angles up to the barrel limit. The exact design of the End-Cap is not yet settled as it should solve the difficult task of a good spectrometric response for protons even above 300MeV without deteriorating the calorimetric resolution of a few MeV γ-rays. During this presentation the current investigation will be explained. In particular, results of experiments with so-called “phoswitch”, which is a combination of two different scintillators, will be presented.