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HK: Fachverband Physik der Hadronen und Kerne

HK 27: Instrumentierung VI

HK 27.8: Vortrag

Dienstag, 22. März 2011, 18:15–18:30, HS1

SiPM’s for particle detection — •Gamal AHMED^1,2, Paul BUEHLER¹, Johann MARTON¹, and Ken SUZUKI¹ — ¹Stefan Meyer Institute of the Austrian Academy of Sciences, Boltzmanngasse 3, 1090 Vienna, Austria. — ²Al-Azhar University, Faculty of Science,Physics Department, 11884, Cairo, Egypt.

Particle identification (PID) for hadrons and leptons over a large range of solid angle and momenta is an essential requirement for physics objectives of the PANDA detector. The solenoid in the target spectrometer produces a magnetic field of B ≈ 2T necessary for momentum resolution of the tracking detectors. PID in the barrel section of the target, spectrometer has to work in this strong magnetic field within the solenoid, since it is surrounded by an electromagnetic calorimeter, it cannot take too much radial space. Readout of promptly emitted Cherenkov light with SiPM is a promising combination, with advantages like compactness, magnetic field resistance; simple operation and fast timing make SiPM an excellent candidate. The detection of momenta up to several GeV/c can be performed by the Detection of Internally Reflected Cherenkov (DIRC) light. The PANDA detector will feature two DIRC detectors, a DIRC in barrel geometry surrounding the target region, and a disc DIRC in the forward region. SiPM’s with a sensitive area of 3mmx3mm are on the market. We discuss here SiPM’s timing performance characteristics and dependence of the operation conditions measurements performed at Stefan Meyer Institute. The single photoelectron time resolution results are also presented.