Berlin 2005 – scientific programme
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HK: Physik der Hadronen und Kerne
HK 22: Postersitzung
HK 22.71: Poster
Monday, March 7, 2005, 16:30–18:00, TU MA141
Simulation of RICH with achromatic and short-focused optics. — •Peter Vlasov1,2, Anatoly Povtoreyko2, James Ritman1, Boris Morozov2, and Anrei Nikitin2 — 1Institute für Kernphysik, Forschungzentrum Jülich, 52428 Jülich — 2Joint Institute for Nuclear Research, Joliot-Curie 6, 141980 Dubna, Russia
A concept for a RICH detector for the PANDA experiment at the future GSI facility (Darmstadt, Germany) was proposed by the LHE JINR experimental group. This detector consists of a disk shaped fused silica radiator that is 12 mm thick, has a 2160 mm diameter, and is arranged perpendicular to the beam axis. This choice of radiator material has a long absorption length for Cherenkov photons with 250 to 700 nm wavelength. An optical scheme constisting of three different media lithium fluoride, fused silica and methanol compensates dispersion effects in this wavelength range. A torus shaped mirror focusses the photons to a surface containing the photosensors. This report will present simulation results of the optical scheme using the Geant4 package, that demonstrates the high velocity resolution for charged kaons with polar angle 1o < θlab<22o and momentum > 0.6 GeV/c.