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A quasi-CW 0.5 MW 118 GHz gyrotron has been designed and constructed. The gyrotron operates in a TE(22,6) cavity mode and provides a Gaussian output mode. It is composed of a triode-type electron gun, an improved beam tunnel, a high-mode-purity low-ohmic-loss cavity with rounded transitions and an optimised non-linear uptaper, a highly efficient internal quasi-optical mode converter employing an advanced launcher together with one phase correcting and two beam shaping reflectors, a large collector with a beam sweeping magnet, and a horizontal RF output through a liquid nitrogen edge-cooled single-disk sapphire window.

Additional information

Authors: PAIN M, CEA, CEN Cadarache, Saint-Paul-lez-Durance (FR);TONON G, CEA, CEN Cadarache, Saint-Paul-lez-Durance (FR);ANTONSEN T M, Centre de Recherches en Physique des Plasmas, Ecole Polytechnique Fédérale de Lausanne (CH);BORIE E, Forschungszentrum Karlsruhe GmbH (DE);DUBROVIN A ET AL., Thomson Tubes Electroniques, Vélizy-Villacoublay (FR)
Bibliographic Reference: Article: Fusion Technology 1994 : Proceedings of the 18th Symposium on Fusion Technology, Vol. 1 (1994) pp. 489-492
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