Effect of methane on stability of plasma in a MW-assisted hydrogen-methane plasma Swaminathan Prasanna, A. Michau, C. Rond, S. Farhat, K. Hassouni and A. Gicquel EPJ Web Conf., 149 (2017) 02020 Published online: 04 August 2017 DOI: 10.1051/epjconf/201714902020