1. Laboratoire de Physique Subatomique et Cosmologie (LPSC), Univ. Grenoble Alpes, CNRS, Grenoble INP* (*Institute of Engineering Univ. Grenoble Alpes), LPSC-IN2P3, Grenoble, France
2. Electrical and Computer Engineering Department, High Voltage Laboratory (Plasma Technology Room), Rion-Patras, Greece