Cold testing of quasi-optical mode converters using a generator for non-rotating high-order gyrotron modes.

Citation data:

The Review of scientific instruments, ISSN: 1089-7623, Vol: 85, Issue: 10, Page: 104709

Publication Year:
2014
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Repository URL:
http://scholarworks.unist.ac.kr/handle/201301/10863
PMID:
25362436
DOI:
10.1063/1.4898180
Author(s):
Kim, Sunggug, Kim, Dongsung, Choe, Munseok, Lee, W., So, J., Choi, EunMi
Publisher(s):
AIP Publishing, AMER INST PHYSICS
Tags:
Physics and Astronomy, Cold testing, High-order, Quasi-optical mode converter
article description
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.

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