München 2006 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 7: Instrumentation und Anwendungen
HK 7.3: Vortrag
Montag, 20. März 2006, 14:45–15:00, H
Status of the ToF Upgrade with MMRPC for the FOPI Detector — •Mladen Kiš — Gesellschaft für Schwerionenforschung, , Planckstr. 1, D-64291 Darmstadt
FOPI at GSI is a 4π detector for charged particles. Multi-strip Multi-gap Resistive Plate Counters (MMRPC) are developed as an upgrade for the FOPI-ToF system aiming to improve FOPI’s particle identification capability for the search of rare particles in the SIS18 energy range. The final detector will be installed in a barrel-shape geometry surrounding FOPI’s Central Drift Chamber. This barrel consists out of 30 modules, each housing 5 MMRPCs. In our final design of the MMRPC we have achieved a single-hit time resolution σt < 70 ps with efficiencies better than 98%. For the readout of 4800 channels we have developed a new electronics with an intrinsic (electronic) resolution σt < 25 ps. We will discuss the performance of the system including its multihit capability and report on the progress in the construction of the MMRPCs.