A compensated multi-gap RPC with 2 m-long strips for the LEPS2 experiment
physics.ins-det
/ Authors
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
and 3 more authors
/ 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.