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

Abstract

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. Here, the required hardware modifications for the HFS measurements are presented here, and the potential issues in this measurement are discussed.

Authors:
 [1];  [1];  [1]
  1. Univ. of California, Los Angeles, CA (United States)
Publication Date:
Research Org.:
General Atomics, San Diego, CA (United States); Univ. of California, Los Angeles, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1609193
Alternate Identifier(s):
OSTI ID: 1461607
Grant/Contract Number:  
FC02-04ER54698; FG02-08ER54984
Resource Type:
Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 89; Journal Issue: 10; Journal ID: ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; instruments & instrumentation; physics; tokamaks; cyclotron resonance; turbulence measurement

Citation Formats

Sung, C., Rhodes, T. L., and Peebles, W. A. Turbulence measurements on the high and low magnetic field side of the DIII-D tokamak. United States: N. p., 2018. Web. doi:10.1063/1.5036520.
Sung, C., Rhodes, T. L., & Peebles, W. A. Turbulence measurements on the high and low magnetic field side of the DIII-D tokamak. United States. doi:10.1063/1.5036520.
Sung, C., Rhodes, T. L., and Peebles, W. A. Wed . "Turbulence measurements on the high and low magnetic field side of the DIII-D tokamak". United States. doi:10.1063/1.5036520. https://www.osti.gov/servlets/purl/1609193.
@article{osti_1609193,
title = {Turbulence measurements on the high and low magnetic field side of the DIII-D tokamak},
author = {Sung, C. and Rhodes, T. L. and Peebles, W. A.},
abstractNote = {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. Here, the required hardware modifications for the HFS measurements are presented here, and the potential issues in this measurement are discussed.},
doi = {10.1063/1.5036520},
journal = {Review of Scientific Instruments},
number = 10,
volume = 89,
place = {United States},
year = {2018},
month = {7}
}

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