Measurement of avalanche size and position resolution of RPCs with different surface resistivities of the high voltage provider

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YUE Qian, LI Yuan-Jing, YE Jin, CHENG Jian-Ping, WANG Yi, LI Jin and WU Yu-Cheng. Measurement of avalanche size and position resolution of RPCs with different surface resistivities of the high voltage provider[J]. Chinese Physics C, 2010, 34(5): 565-570. doi: 10.1088/1674-1137/34/5/010
YUE Qian, LI Yuan-Jing, YE Jin, CHENG Jian-Ping, WANG Yi, LI Jin and WU Yu-Cheng. Measurement of avalanche size and position resolution of RPCs with different surface resistivities of the high voltage provider[J]. Chinese Physics C, 2010, 34(5): 565-570.  doi: 10.1088/1674-1137/34/5/010 shu
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Received: 2009-06-15
Revised: 2009-07-23
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Measurement of avalanche size and position resolution of RPCs with different surface resistivities of the high voltage provider

    Corresponding author: YUE Qian,

Abstract: 

The effects of surface resistivity of the high voltage provider on the space dispersion of the induced charge of a prototype Resistive Plate Chamber (RPC) have been studied experimentally and theoretically. The results of both experiment and theory agree and confirm that a two-Gaussian function can be used to fit the dispersion of the induced charge of the RPC. It is shown that the Gaussian function with the narrower width is mainly due to the expansion of the avalanche charge in the gas gap of the RPC, and the Gaussian function with the larger width is due to the charge dispersion when it passes through the resistive carbon film. This will be useful in the RPC design when one wants to make an RPC with high position resolution.

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