Cold testing of quasi-optical mode converters using a generator for non-rotating high-order gyrotron modes.
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The Review of scientific instruments, ISSN: 1089-7623, Vol: 85, Issue: 10, Page: 104709
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- Physics and Astronomy; Cold testing; High-order; Quasi-optical mode converter
In this paper, we test the performance of a quasi-optical, internal-gyrotron mode converter. When cold testing mode converters, a rotating higher-order mode is commonly used. However, this requires a nontrivial design and precise alignment. We thus propose a new technique for testing gyrotron mode converters by using a simple, non-rotating, higher-order mode generator. We demonstrate the feasibility of this technique for a W-band gyrotron quasi-optical mode converter by examining the excitation of a TE6,2 mode from a non-rotating mode generator. Our results demonstrate that this new cold-test scheme is an easy and efficient method for verifying the performance of quasi-optical mode converters.