@inproceedings{3182590,
    title = "Towards Advanced Fusion Gyrotrons: 2018 Update on Activities within
EUROfusion",
    author = "Jelonnek, John and Aiello, Gaetano and Alberti, Stefano and Avramidis, and Konstantinos and Bruschi, Alex and Chelis, Ioannis and Franke, Thomas and and Gantenbein, Gerd and Garavaglia, Saul and Granucci, Gustavo and and Grossetti, Giovanni and Illy, Stefan and Ioannidis, Zisis and Jin, and Jianbo and Kalaria, Parth and Latsas, George and Pagonakis, Ioannis and and Peponis, Dimitrios and Rzesnicki, Tomasz and Ruess, Sebastian and Ruess, and Tobias and Scherer, Theo and Schmid, Martin and Strauss, Dirk and Wu, and Chuanren and Thumm, Manfred and Tigelis, Ioannis and Minh Quang Tran and and Wilde, Fabian and Zein, Andy",
    year = "2019",
    publisher = "E D P SCIENCES",
    booktitle = "20TH JOINT WORKSHOP ON ELECTRON CYCLOTRON EMISSION AND ELECTRON
CYCLOTRON RESONANCE HEATING (EC20)",
    doi = "10.1051/epjconf/201920304007",
    abstract = "During the ongoing pre-concept phase (2014 - 2020) for a possible future
European DEMOnstration Fusion Power Plant (DEMO) the activities within
EUROfusion WP HCD EC Gyrotron R&D and Advanced Developments are
focusing on options for near-term solutions, and, at the same time, on
long-term even more advanced options. The near-term target for DEMO is
to realize pulsed operation. According to the current baseline it will
probably use an EC system operating at 170 GHz and 204 GHz is being
assessed, whereas the long-term target aims for steady-state operation
and frequencies for current drive up to 240 GHz. Common targets for both
are an RF output power per unit of significantly above 1 MW (target: 2
MW) and a total gyrotron efficiency of significantly higher than 60 %.
Frequency step-tunability and multi-purpose/multi-frequency operation
have to be considered. Those targets shall be achieved by considering
the coaxial-cavity gyrotron technology and advanced technologies for key
components (e.g. CVD diamond-disk Brewster angle window). Advanced
simulation and test tools are complementing the research and
developments. Gyrotron development is additionally supported by a
significant investment into a new multi-megawatt long-pulse gyrotron
test stand which is under final installation at KIT currently."
}