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

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arxiv physics/0612083 v1 pith:JW6PMQJN submitted 2006-12-08 physics.ins-det

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
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A.Maevskaya V.Razin A.Semak A.Smirnitskiy Yu.Sviridov V.Tiflov K.Voloshin V. Zaets B. Zagreev
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classification physics.ins-det
keywords electrodesglassbulkincreasemadephosphaterateresistivity
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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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