Studies on RPC position resolution with different surface resistivity of high voltage provider

The effect of surface resistivity of high voltage provider on the space dispersion of induced charge of RPC has been studied experimentally. The result of experimental measurement shows that two-Gaussian function can be used to fit the dispersion of induced charge of RPC. The Gaussian function with narrower width is mainly due to the expansion of avalanche charge in the gas gap of RPC and the Gaussian function with larger width is due to the charge dispersion when it passes through the resistive carbon film.