title: Cold testing of quasi-optical mode converters using a generator for non-rotating high-order gyrotron modes.
abstract: 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.
authors.affiliation: School of Electrical and Computer Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 689-798, South Korea.
authors.forename: S G
authors.initials: SG
authors.lastname: Kim
authors.affiliation: Physics Department, Ulsan National Institute of Science and Technology (UNIST), Ulsan 689-798, South Korea.
authors.forename: D S
authors.initials: DS
authors.lastname: Kim
authors.affiliation: Physics Department, Ulsan National Institute of Science and Technology (UNIST), Ulsan 689-798, South Korea.
authors.forename: M S
authors.initials: MS
authors.lastname: Choe
authors.affiliation: Agency for Defense Development (ADD), Daejeon 305-152, South Korea.
authors.forename: W
authors.initials: W
authors.lastname: Lee
authors.affiliation: Agency for Defense Development (ADD), Daejeon 305-152, South Korea.
authors.forename: J
authors.initials: J
authors.lastname: So
authors.affiliation: School of Electrical and Computer Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 689-798, South Korea.
authors.forename: E M
authors.initials: EM
authors.lastname: Choi