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HK: Fachverband Physik der Hadronen und Kerne

HK 46: Instrumentation

HK 46.1: Vortrag

Dienstag, 5. März 2013, 16:45–17:00, WIL-A221

CBM Time-of-Flight wall layout - design considerations — •Ingo Deppner and Norbert Herrmann — Physikalisches Institut, Universität Heidelberg

The Compressed Baryonic Matter spectrometer (CBM) is expected to be operational in the year 2018 at the Facility for Anti-proton and Ion Research (FAIR) in Darmstadt, Germany. The key element providing hadron identification at incident energies between 2 and 10 AGeV is a Time-of-Flight (ToF) wall covering the polar angular range from 2.5^∘-25^∘ and full azimuth [1]. The necessary particle identification capabilities require a 80 ps system time resolution at high efficiency and, due to 10 MHz interaction rate, a rate capability of up to 30 kHz/cm². We will discuss the existing conceptual design which foresees a 120 m² ToF-wall composed of Multi-gap Resistive Plate Chambers (MRPC) constructed in a multi-strip configuration. The wall is designed in a modular way such that it can be located at a distance of 6 m downstream of the target for SIS 100 and with additional components at 10 m for SIS 300. The performance will be discussed on the basis of two fully differential MRPC full size prototypes developed at our institute.

Supported by EU/FP7 WP2; BMBF 06HD9121I.
[1] I. Deppner et al., The CBM time-of-flight wall, Nucl. Instr. and Meth. A, 661, Sup. 1 (2012), p. 121 doi.org/10.1016/j.nima.2010.09.165