Mass number identification by Alfvén wave diagnostics in hydrogen and helium plasmas in TCABR - Puglia, Paulo Giovane Paschoali Pereira; Andriati, Alex Valerio; Ruchko, Leonid Fedorovich; Guimarães Filho, Zwinglio de Oliveira; Elfimov, Artour G; Galvão, Ricardo Magnus Osório (Physics Letters A, 2016)