Turbulence measurements on the high and low magnetic field side of the DIII-D tokamak

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In this paper, we address the challenging question of measuring turbulence levels on the high magnetic field side (HFS) of tokamak plasmas. Although turbulence measurements on the HFS can provide a stringent constraint for the turbulence model validation, to date only low magnetic field side (LFS) measured turbulence has been used in validation studies. To address this issue, an eight channel Correlation Electron Cyclotron Emission (CECE) system at DIII-D was modified to probe both LFS and HFS. In contrast to the second harmonic extraordinary mode electron cyclotron resonance emission that is typically used in CECE, we show that it is possible to probe the HFS using fundamental O-mode electron cyclotron resonance emission. The required hardware modifications for the HFS measurements are presented here, and the potential issues in this measurement are discussed. Published by AIP Publishing.
Publisher
AMER INST PHYSICS
Issue Date
2018-10
Language
English
Article Type
Article; Proceedings Paper
Citation

REVIEW OF SCIENTIFIC INSTRUMENTS, v.89, no.10, pp.10H106

ISSN
0034-6748
DOI
10.1063/1.5036520
URI
http://hdl.handle.net/10203/272665
Appears in Collection
NE-Journal Papers(저널논문)
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