A compensated multi-gap RPC with 2 m-long strips for the LEPS2 experiment

K. Watanabe; S. Tanaka; W. C. Chang; H. Chen; M. L. Chu; J. J. Cuenca-Garcia; T. Gogami; D. Gonzalez-Diaz; M. Niiyama; Y. Ohashi; H. Ohnishi; N. Tomida; M. Yosoi

doi:10.1016/j.nima.2019.02.014

arXiv · 1809.06571

A compensated multi-gap RPC with 2 m-long strips for the LEPS2 experiment

K. Watanabe·S. Tanaka·W. C. Chang·H. Chen·M. L. Chu·J. J. Cuenca-Garcia·T. Gogami·D. Gonzalez-Diaz·M. Niiyama·Y. Ohashi·H. Ohnishi·N. Tomida·M. Yosoi

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Abstract

We have developed multi-gap resistive plate chambers (MRPCs) with 2.5 x 200 cm2 readout strips for the time-of-flight (TOF) detector system of the LEPS2 experiment at SPring-8. These chambers consist of 2 stacks and 5 gas gaps per stack, in a mirrored configuration. A time resolution of sigma ~ 80 ps was achieved for any position within a strip (at above 99% detection efficiency); after performing the time-charge slewing correction, this value could be reduced to 60 ps. A link between the small contribution of the slewing correction to timing and the suppression of modal dispersion in the detector could be established.

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K. Watanabe, S. Tanaka, W. C. Chang, H. Chen, M. L. Chu, J. J. Cuenca-Garcia, T. Gogami, D. Gonzalez-Diaz, M. Niiyama, Y. Ohashi, H. Ohnishi, N. Tomida, M. Yosoi. 2018-09-19. A compensated multi-gap RPC with 2 m-long strips for the LEPS2 experiment. https://doi.org/10.1016/j.nima.2019.02.014

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