A RPC test station based on ROOT and VME

Lü, Zhi-Peng; Zhang, Qingmin; Zhao, J.; Zhang, Jiawen; Xie, Y.; Qian, S.; Ning, Z.; Kebwaro, Jeremiah Monari; He, Zixing

doi:10.1007/s41365-016-0034-5

Cited by 1 publication

(1 citation statement)

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“…RPC's efficiency and noise rate were measured with VME scalar V560, while the charge of RPC signal was measured by VME QDC unit V965A. For the details of the test system, please refer to the reference [35]. The temperature was controlled at 21±2 • C and the threshold was set to 70 mV.…”

Section: Methodsmentioning

confidence: 99%

More environment-friendly and safer working gas mixtures for Bakelite RPCs operated in streamer mode

Zhang

et al. 2017

J. Inst.

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This paper presents experimental results of RPCs performances with different working gas mixtures. Owing to Freon's high global warming potential, its threat to RPCs aging and its large consumption in large particle physics experiments, studies to minimize the concentration of HFC-134A, and even its complete replacement, have been undertaken. In addition, the reduction of iso-butane is also a favorable strategy, due to the flammability level of the gas mixture. Freon-less working gas mixture of Ar/HFC-134A/i-C4H10/CO2=20/0/8/72 was chosen with plateau efficiency of 86.3% and noise rate of 0.61 Hz/cm2. For working gas with lower ratio of Freon, Ar/HFC-134A/i-C4H10/CO2=20/20/8/52 was suggested with plateau efficiency of 91.0% and noise rate of 0.19 Hz/cm2, in which Freon was decreased by 22% compared to the BESIII RPC gas mixture. Furthermore, iso-butane was decreased to 6% with RPC's efficiency of 90% and noise rate of 0.20 Hz/cm2 achieved. Finally, the explanation of RPC's different performances at various working gas mixtures has been validated by the investigation of secondary streamers. This study will be helpful for RPC's application in future large particle physics experiments, in which RPCs can run in streamer mode.

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Section: Methodsmentioning

confidence: 99%