1. Development of high-rate MRPCs for high resolution time-of-flight systems.
- Author
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Wang, Jingbo, Wang, Yi, Gonzalez-Diaz, D., Chen, Huangshan, Fan, Xingming, Li, Yuanjing, Cheng, Jianping, Kaspar, Marcus, Kotte, Roland, Laso Garcia, Alejandro, Naumann, Lothar, Stach, Daniel, Wendisch, Christian, and Wüstenfeld, Jörn
- Subjects
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STRUCTURAL plates , *TIME-of-flight measurements , *PARTICLES (Nuclear physics) , *NUCLEAR physics experiments , *ELECTRON beams , *ELECTRIC properties of materials , *MECHANICAL behavior of materials - Abstract
Abstract: We show how the high charged-particle flux (1–20kHz/cm2) expected over the 150m2 large time-of-flight wall of the future Compressed Baryonic Matter experiment (CBM) at FAIR can be realistically handled with Multi-gap Resistive Plate Chambers (MRPCs). This crucial 100-fold increase of the chamber rate capability, as compared to that of standard MRPCs presently employed in experiments resorting to sub-100ps timing, has been achieved thanks to the development of a new type of low-resistive doped glass. Following the encouraging results previously obtained with small counters, two types of modules (active area: ∼150cm2) have been built at Tsinghua University with the new material. The measurements conveyed in this work, obtained with a quasi- minimum ionizing electron beam (γβ≥3), prove their suitability as the building blocks of the present hadron-identification concept of the CBM experiment. Namely, they provide a time resolution better than 80ps and an efficiency above 90% at a particle flux well in excess of 20kHz/cm2 (up to 35–60kHz/cm2), being at the core of a modular concept that is easily scalable. Recent measurements of the electrical and mechanical properties of this new material, together with its long-term behavior, are shortly summarized. [Copyright &y& Elsevier]
- Published
- 2013
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