%0 Journal Article
%T Performances of silicone coated high resistive bakelite RPC
%A S. Biswas
%A Purba Bhattacharya
%A S. Bhattacharya
%A S. Bose
%A S. Chattopadhyay
%A N. Majumdar
%A S. Mukhopadhyay
%A S. Saha
%A Y. P. Viyogi
%J Physics
%D 2012
%I arXiv
%R 10.1016/j.nima.2010.09.168
%X Performances of several single gap (gas gap 2 mm) prototype Resistive Plate Chambers (RPC) made of high resistive ({\rho} \sim 1010 - 1012 {\Omega} cm) bakelite, commercially available in India have been studied in recent times. To make the inner electrode surfaces smooth, a thin coating of silicone has been applied. An efficiency > 90% and time resolution \sim 2 ns (FWHM) have been obtained for both the streamer and the avalanche mode. The induced charge distributions of those silicone coated RPC are studied and the results are presented. A numerical study on the effect of surface roughness of the resistive electrodes on the electric field of the device has been carried out using Garfield-neBEM code. A few results for a simplified model representing surface roughness, measured using a surface profilometer for the bakelite surfaces, have also been presented.
%U http://arxiv.org/abs/1206.5627v1