Towards Advanced Fusion Gyrotrons: 2018 Update on Activities within EUROfusion John Jelonnek, Gaetano Aiello, Stefano Alberti, Konstantinos Avramidis, Alex Bruschi, Ioannis Chelis, Thomas Franke, Gerd Gantenbein, Saul Garavaglia, Gustavo Granucci et al. (20 more) EPJ Web Conf., 203 (2019) 04007 Published online: 25 March 2019 DOI: 10.1051/epjconf/201920304007