Numerical Study of Electrostatic Field Distortion on LPTPC End-Plates based on Bulk Micromegas Modules Purba Bhattacharya, Deb Sankar Bhattacharya, Supratik Mukhopadhyay, Nayana Majumdar, Sudeb Bhattacharya, Paul Colas and David Attié EPJ Web Conf., 174 (2018) 06007 Published online: 21 February 2018 DOI: 10.1051/epjconf/201817406007