Erlangen 2001 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 9: Postersitzung: Instrumentation und Anwendungen
HK 9.22: Poster
Dienstag, 20. März 2001, 10:30–12:45, R
Development of a compact photon detector for ANKE at COSY — •V. Hejny1, J. Bacelar2, M. Büscher1, V. Chernyshev3, Ye.S. Golubeva4, M. Hoek5, H.R. Koch1, L.A. Kondratyuk3, H. Löhner2, H. Machner1, A. Magiera6, H. Müller7, V. Nedorezov4, R. Novotny5, K. Römer5, H. Seyfarth1, H. Ströher1, C. Wilkin8, and A. Wrońska6 — 1Institut für Kernphysik, FZ Jülich — 2KVI, Groningen — 3ITEP, Moscow — 4Institute for Nuclear Research, Moscow — 5II. Phys. Institut, Universität Gießen — 6Institute of Physics, Jagellonian University, Cracow — 7Institut für Kern- und Hadronenphysik, FZ Rossendorf — 8University College London
Photon detection is a very important tool in hadron physics at intermediate energies: many of the produced (neutral) mesons have significant decay branches into multiple photon final states and these photons can be efficiently detected with good resolution using modern high density inorganic scintillators. Photon detectors with large solid angle have been designed, built and are being operated with great success at many accelerators. At COSY, it is planned to build such a device to be operated in combination with the ANKE detector system, which is used to study nucleon-nucleon and nucleon-nucleus collisions at intermediate energies by detecting charged-particle final states. Space limitations and the magnetic stray field of the ANKE dipole require the use of a very dense scintillator material and special fine-mesh photomultipliers. Recent tests show that PbWO4 (X0 = 0.89 cm) is well suited for this purpose despite its low light output. The current status of the project will be presented and the design of the detector will be discussed.