A timing RPC with low resistive ceramic electrodes

• Published in: Journal of instrumentation 2019-09, Vol.14 (9), p.C09007-C09007
• Main Authors: Sultanov, R., Akindinov, A., Beyer, R., Dreyer, J., Fan, X., Greifenhagen, R., Kämpfer, B., Kotte, R., Garcia, A. Laso, Malkevich, D., Naumann, L., Plotnikov, V., Prokudin, M., Shirinkin, S., Stach, D.
• Format: Article
• Language: English
• Subjects: Antiparticles; Antiprotons; Ceramics; Electrodes; Electrons; Fluxes; Projectiles; Relativism; Relativistic effects; Resistive plate chambers; Silicon carbide; Silicon nitride
• ISSN: 1748-0221; 1748-0221
• DOI: 10.1088/1748-0221/14/09/C09007

For precise start time determination a Beam Fragmentation T0 Counter (BFTC) is under development for the Time-of-Flight Wall of the Compressed Baryonic Matter Spectrometer (CBM) at the Facility for Antiproton and Ion Research (FAIR) at Darmstadt/Germany. This detector will be located around the beam pipe, covering the front area of the Projectile Spectator Detector. The fluxes at this region are expected to exceed 105cm−2s−1. Resistive plate chambers (RPC) with ceramic composite electrodes could be use because of their high rate capabilities and radiation hardness of material. Efficiency ≥ 97 %, time resolution ≤ 90 ps and rate capability ≥ 105cm−2s−1 were confirmed during many tests with high beam fluxes of relativistic electrons. We confirm the stability of these characteristics with low resistive Si3N4/SiC floating electrodes for a prototype of eight small RPCs, where each of them contains six gas gaps. The active RPC size amounts 20×20 mm2 produced on basis of Al3O2 and Si3N4/SiC ceramics. Recent test results obtained with relativistic electrons at the linear accelerator ELBE of the Helmholtz-Zentrum Dresden-Rossendorf with new PADI-10 Front-end electronic will be presented.