A frequency tunable, eight-channel correlation ECE system for electron temperature turbulence measurements on the DIII-D tokamak

A new eight-channel correlation electron cyclotron emission diagnostic has recently been installed on the DIII-D tokamak to study both turbulent and coherent electron temperature fluctuations under various plasma conditions and locations. This unique system is designed to cover a broad range of oper...

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Bibliographic Details
Published in:Review of scientific instruments 2016-11, Vol.87 (11), p.11E123-11E123
Main Authors: Sung, C., Peebles, W. A., Wannberg, C., Rhodes, T. L., Nguyen, X., Lantsov, R., Bardóczi, L.
Format: Article
Language:English
Subjects:
CORRELATIONS
CYCLOTRONS
DETECTION
Diagnostic systems
DOUBLET-3 DEVICE
Electron energy
ELECTRON TEMPERATURE
ELECTRONS
EMISSION
Emission analysis
FLUCTUATIONS
GHZ RANGE 01-100
INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
OPTICAL SYSTEMS
OSCILLATORS
PLASMA
Scientific apparatus & instruments
Temperature
Tokamak devices
TURBULENCE
Variation
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Summary:A new eight-channel correlation electron cyclotron emission diagnostic has recently been installed on the DIII-D tokamak to study both turbulent and coherent electron temperature fluctuations under various plasma conditions and locations. This unique system is designed to cover a broad range of operation space on DIII-D (1.6-2.1 T, detection frequency: 72-108 GHz) via four remotely selected local oscillators (80, 88, 96, and 104 GHz). Eight radial locations are measured simultaneously in a single discharge covering as much as half the minor radius. In this paper, we present design details of the quasi-optical system, the receiver, as well as representative data illustrating operation of the system.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.4961296