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HK: Fachverband Physik der Hadronen und Kerne
HK 47: Instrumentation und Anwendungen
HK 47.2: Talk
Thursday, March 15, 2007, 14:30–14:45, F
Upgrade of the FOPI ToF Barrel with MMRPCs — •Mladen Kiš for the FOPI collaboration — Gesellschaft für Schwerionenforschung, Darmstadt
Multi-strip Multi-gap Resistive Plate Counters [1] (MMRPCs) were developed for FOPI to improve the existing ToF system and in particular to obtain charged kaon identification with the FOPI setup. In order to achieve a full phase space coverage, a time resolution of better than 100 ps is required for the complete system. The system performance was evaluated [2] with a proton test beam at SIS using a pre-production series of the counters. The result of the performance evaluation will be reported demonstrating the capability of the counter concept.
The readout of the MMRPCs is done via a custom electronic design [3] developed at GSI, using a 3-stage broad-band preamplifier and an ASIC based TAC digitizer [4]. This electronic system is optimized for processing small RPC signals (85 fC on average) and has an excellent intrinsic time resolution of σe ≤ 15 ps. We will discuss the status of the series production and the integration of the MMRPCs that aims at installing the full subsystem into the FOPI setup in spring 2007.
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A. Schüttauf et al., Nucl. Phys. B (Proc. Supp.) 158 (2006) 52.
M. Ciobanu et al., submitted to IEEE Trans. Nucl. Sci.
K. Koch et al., IEEE Trans. Nucl. Sci. 52 (2005), 745.
Supported by EU/FP6 HadronPhysics and BMBF 06HD953.