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RPC with low-resistive phosphate glass electrodes as a candidate for the CBM TOF

A. Akindinov·V. Ammosov·V. Gapienko·Yu. Grishuk·F. Guber·N. Herrmann·O. Karavichev·S. Kiselev·A. Maevskaya·V. Razin·A. Semak·A. Smirnitskiy·Yu. Sviridov·V. Tiflov·K. Voloshin·V. Zaets·B. Zagreev
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Abstract

Usage of electrodes made of glass with low bulk resistivity seems to be a promising way to adapt the Resistive Plate Chambers (RPC) to the high-rate environment of the upcoming CBM experiment. A pilot four-gap RPC sample with electrodes made of phosphate glass, which has bulk resistivity in the order of 10^10 Ohm cm, has been studied with MIP beam for TOF applications. The tests have yielded satisfactory results: the efficiency remains above 95% and the time resolution stays within 120 ps up to the particle rate of 18 kHz/cm2. The increase in rate from 2.25 to 18 kHz/cm2 leads to an increase of estimated "tails" fraction in the time spectrum from 1.5% to 4%.

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A. Akindinov, V. Ammosov, V. Gapienko, Yu. Grishuk, F. Guber, N. Herrmann, O. Karavichev, S. Kiselev, A. Maevskaya, V. Razin, A. Semak, A. Smirnitskiy, Yu. Sviridov, V. Tiflov, K. Voloshin, V. Zaets, B. Zagreev. 2006-12-08. RPC with low-resistive phosphate glass electrodes as a candidate for the CBM TOF. https://doi.org/10.1016/j.nima.2006.12.027

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