Electron temperature fluctuation measurements and techniques in the DIII-D tokamak

Journal Article · Wed Jan 01 00:00:00 EST 1997 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.1147613· OSTI ID:488779

Rettig, C L; Peebles, W A ^[1]; Lohr, J ^[2]; Austin, M E ^[3]

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1. Institute of Plasma and Fusion Research and Electrical Engineering Department, University of California, Los Angeles, California (United States)
2. General Atomics, San Diego, California (United States)
3. University of Maryland, Maryland (United States)

Several techniques for determining the level and characteristics of electron temperature fluctuations via measurements and analysis of electron cyclotron emission (ECE) have recently been proposed and demonstrated [S. Sattler and H. J. Hartfuss, Plasma Phys. Cont. Fus. {bold 35}, 1285 (1993) and G. Cima {ital et al.}, Phys. Plasmas (1994)]. A technique relying on the correlation of ECE in orthogonal frequency bins but lying within the line broadening of the local emission spectrum is being pursued at DIII-D. Special concerns include the effect of large rotation in the discharges due to neutral beam injection and extremely low fluctuation levels in enhanced confinement regimes such as negative central shear discharges. An antenna design optimized for fluctuation studies is also being developed. {copyright} {ital 1997 American Institute of Physics.}

• OSTI ID: 488779
• Report Number(s): CONF-960543-; ISSN 0034-6748; TRN: 97:009950
• Journal Information: Review of Scientific Instruments, Vol. 68, Issue 1; Conference: 11. annual high-temperature plasma diagnostics conference, Monterey, CA (United States), 12-16 May 1996; Other Information: PBD: Jan 1997
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION
TOKAMAK DEVICES
ELECTRON TEMPERATURE
PLASMA DIAGNOSTICS
ELECTRON CYCLOTRON-RESONANCE
ROTATION
LINE BROADENING
RADIOMETERS
ANTENNAS
RF SYSTEMS
CALIBRATION
FLUCTUATIONS
radiometry