H-mode access and the role of spectral shift with electrode biasing in the TCABR tokamak - Grenfell, Gustavo Guedes; Oliveira, Diego Sales de; Elizondo, Juan Iraburu; Reis, A. P.; Baquero, Wilson Andres Hernandez; Oliveira, Alexandre Machado de; Ronchi, Gilson; Sa, Wanderley Pires de; Guimarães Filho, Zwinglio de Oliveira; Nascimento, Ivan Cunha; Severo, José Helder Facundo (Physics of Plasmas, 2018)