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Bochum 2009 – wissenschaftliches Programm

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HK: Fachverband Hadronen und Kerne

HK 18: Accelerators and Instrumentation I

HK 18.8: Vortrag

Montag, 16. März 2009, 18:15–18:30, H-ZO 80

Studies on suface quality of PlexiGlas for a DIRC detector at the WASA-at-COSY experiment — •Adrian Schmidt1, Christoph Adolph1, Jens Bisplinghoff2, Wolfgang Eyrich1, Andreas Teufel1, Cecilia Pizzolotto1, Christian Vogel1, Regina Siudak2, and Kai Ulbrich21Physikalisches Institut IV der Universität Erlangen-Nürnberg — 2Helmholtz Institut für Strahlen- und Kernphysik Universität Bonn

The WASA-at-COSY experiment at the Forschungszentrum Jülich provides a nearly 4π detector including a forward spectrometer for studies on η− and η′−meson decays in proton-proton collisions. Simulations have shown that an additional Detector of Internaly Reflected Cherenkov light (DIRC) in front of the Forward Range Hodoscope will significantly increase the particle identification and energy resolution for both the decayed particles and the background. For the reconstruction of the Cherenkov angle of the light generated inside the DIRC radiator, it is necessary that the Cherenkov light is guided isogonal and with only minimal loss to the Photosensors. Most important in this context is a perfect surface texture. We present studies on optical properties of different finished PlexiGlas bars and show the results of a first DIRC prototype test at COSY.

supported by German BMBF and Forschungszentrum Jülich

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