Jelonnek J, Aiello G, Alberti S, Avramidis K, Braunmueller F, Bruschi A, Chelis J, Franck J, Franke T, Gantenbein G, et al. Design considerations for future {DEMO} gyrotrons: A review on related gyrotron activities within {EUROfusion}. Fusion Engineering and Design [Internet]. 2017;123:241?246.