High-Efficient Mode Converter for ITER Gyrotron |
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| Authors: | A. A. Bogdashov A. V. Chirkov G. G. Denisov A. N. Kuftin Yu. V. Rodin E. A. Soluyanova V. E. Zapevalov |
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| Affiliation: | (1) Institute of Applied Physics, Russian Academy of Sciences, 46 Ulyanov Street, 603950 Nizhny Novgorod, Russia |
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| Abstract: | A high-efficiency mode converter of the ITER gyrotron operating mode into the Gaussian wave beam has been developed. It includes an irradiating waveguide with shallow deformation and profiled quasi-optical mirrors to increase the Gaussian content. Low-power tests were carried out with a TE25.10 mode exciter and a mode converter. A prototype of the short-pulsed 170 GHz gymtmn with the new converter was manufactured and tested. Diffraction losses measured inside the tube were less then 2% at the 1 MW power level. A high Gaussian mode content in the output beam has been also demonstrated. |
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| Keywords: | gyrotron high-order operating mode mode converter quasi-optical mirrors Gaussian wave beam |
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