EPJ Web of Conferences (Jan 2019)

Studies towards an upgraded 1.5 MW gyrotron for W7-X

  • Avramidis Konstantinos A.,
  • Ruess Tobias,
  • Mentgen Felix,
  • Jin Jianbo,
  • Wagner Dietmar,
  • Gantenbein Gerd,
  • Illy Stefan,
  • Ioannidis C.,
  • Laqua Heinrich P.,
  • Pagonakis Ioannis Gr.,
  • Rzesnicki Tomasz,
  • Thumm Manfred,
  • Wolf Robert C.,
  • Jelonnek John

DOI
https://doi.org/10.1051/epjconf/201920304003
Journal volume & issue
Vol. 203
p. 04003

Abstract

Read online

Studies towards a 1.5 MW, 140 GHz CW gyrotron, with the capability of MW-class operation also at 175 GHz, are ongoing at Karlsruhe Institute of Technology in view of a possible future upgrade of the ECRH system of the stellarator W7-X. The upgrade of the existing 1.0 MW, 140 GHz European gyrotron for W7-X has been chosen as a development path. Detailed designs of the cavity, the non-linear uptaper, and the quasi-optical launcher for the upgraded gyrotron have been obtained and have been validated numerically. In parallel, a mode generator, intended for low-power tests of the quasi-optical mode converter system of the upgraded gyrotron, has been designed, manufactured, and successfully tested.