Article In: orcid
Novel mono-static arrangement of the ASDEX Upgrade high field side reflectometers compatible with electron cyclotron resonance heating stray radiation
Review of Scientific Instruments
— 2012 — AIP Publishing
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Authors:
Published in
July 11, 2012
Abstract
<jats:p>The ASDEX Upgrade frequency modulated continuous wave broadband reflectometer system uses a mono-static antenna configuration with in-vessel hog-horns and 3 dB directional couplers. The operation of the new electron cyclotron resonance heating (ECRH) launcher and the start of collective Thomson scattering experiments caused several events where the fragile dummy loads inside the high field side directional couplers were damaged, due to excessive power resulting from the ECRH stray fields. In this paper, we present a non-conventional application of the existing three-port directional coupler that hardens the system to the ECRH stray fields and at the same time generates the necessary reference signal. Electromagnetic simulations and laboratory tests were performed to validate the proposed solution and are compared with the in-vessel calibration tests.</jats:p>
Publication details
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Publication version
VoR - Version of Record
Publisher
AIP Publishing
Title of the publication container
Review of Scientific Instruments
Volume
83
Issue
10
ISSN
0034-6748
Publication language (ISO code)
eng - English
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