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arXiv · 1605.02558

Time and position resolution of high granularity, high counting rate MRPC for the inner zone of the CBM-TOF wall

M. Petriş·D. Bartoş·G. Caragheorgheopol·I. Deppner·J. Frühauf·N. Herrmann·M. Kiš·P-A. Loizeau·M. Petrovici·L. Rǎdulescu·V. Simion·C. Simon
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Abstract

Multi-gap RPC prototypes with readout on a multi-strip electrode were developed for the small polar angle region of the CBM-TOF subdetector, the most demanding zone in terms of granularity and counting rate. The prototypes are based on low resistivity ($\sim$10$^{10}$ $Ω$cm) glass electrodes for performing in high counting rate environment. The strip width/pitch size was chosen such to fulfill the impedance matching with the front-end electronics and the granularity requirements of the innermost zone of the CBM-TOF wall. The in-beam tests using secondary particles produced in heavy ion collisions on a Pb target at SIS18 - GSI Darmstadt and SPS - CERN were focused on the performance of the prototype in conditions similar to the ones expected at SIS100/FAIR. An efficiency larger than 98\% and a system time resolution in the order of 70~-~80~ps were obtained in high counting rate and high multiplicity environment.

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M. Petriş, D. Bartoş, G. Caragheorgheopol, I. Deppner, J. Frühauf, N. Herrmann, M. Kiš, P-A. Loizeau, M. Petrovici, L. Rǎdulescu, V. Simion, C. Simon. 2016-05-09. Time and position resolution of high granularity, high counting rate MRPC for the inner zone of the CBM-TOF wall. https://doi.org/10.1088/1748-0221%2F11%2F09%2Fc09009

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