Recent development results in russia of megawatt power gyrotrons for plasma fusion installations

Abstract

Regime with 1000-s pulse duration at 1MW output power and efficiency ~53% has been implemented in the ITER gyrotron prototype. Upgrade of few gyrotron units was undertaken to increase its operation reliability. New gyrotron prototype equipped with modernized units will be manufactured in summer and its test will start in autumn 2012. Interfaces between a gyrotron and an equipment which is to be delivered as its integrated package from one side and ITER systems and services from another side are now main subject of discussion with IO team. Manufacturing and testing of the multi-frequency gyrotron for ASDEX Upgrade with new tunable window is in progress. Short pulse (0.1 sec) tests showed good operation at 4 frequencies. Gaussian mode content in the output wave beam is high. Ceramics window used for the short pulse tests was replaced to the diamond window. In 3 second pulses the gyrotron showed 0.9 MW at 140 GHz and 0.8 MW at 105 GHz. Gyrotron conditioning will be continued in July 2012. © Owned by the authors, published by EDP Sciences, 2012.