Abstract
An MRPC prototype for the future CBM-TOF inner area has been developed. The counter assembled with low resistive glass consists of 10×0.22 mm gas gaps and 2×8 readout pads. The size of each pad is 20 mm×20 mm with an interval of 2 mm between pads. The signals of the counter are collected by 4 eight-pin connectors. Preliminary tests performed with cosmic-rays showed an efficiency over 98% and a time resolution around 60 ps. The measured crosstalk, dark current and dark rate were at a very low levels. Results under uniform irradiation performed at JINR with high energy deuteron showed a time resolution of 40–50 ps and over 98% efficiency at a low flux rate, meanwhile at a flux up to 70 kHz/cm2, 93% efficiency and 77 ps time resolution still remained. These excellent performances call fully meet the demand of CBM-TOF inner wall.
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