Transient nonthermal electron cyclotron emission phenomena in high [beta] TFTR plasmas

Journal Article · Sun Jan 01 00:00:00 EST 1995 · Review of Scientific Instruments; (United States)

DOI:https://doi.org/10.1063/1.1146237· OSTI ID:6699199

Taylor, G; Fredrickson, E; Janos, A ^[1]

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1. Plasma Physics Laboratory, Princeton University, Princeton, New Jersey 08543 (United States)

Intense bursts of nonthermal electron cyclotron emission (ECE), measured with a grating polychromator, have been observed to coincide with edge localized modes in TFTR [ital H]-mode plasmas. These bursts contain random 10--150 [mu]s emission spikes. Similar nonthermal ECE bursts or spikes have been observed just before the thermal quench during major disruptions in high [beta] TFTR plasmas. The recent installation of a second fast ECE grating polychromator system, at a different toroidal location, has provided additional data on this bursting phenomenon which suggests that the source of the nonthermal ECE may be highly anisotropic and/or poloidally localized on a helical flux surface.

• OSTI ID: 6699199
• Journal Information: Review of Scientific Instruments; (United States), Vol. 66:1; ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
TFTR TOKAMAK
ELECTRON CYCLOTRON-RESONANCE
HIGH-BETA PLASMA
MICHELSON INTERFEROMETER
PLASMA DIAGNOSTICS
SPATIAL RESOLUTION
TRANSIENTS
CLOSED PLASMA DEVICES
CYCLOTRON RESONANCE
INTERFEROMETERS
MEASURING INSTRUMENTS
PLASMA
RESOLUTION
RESONANCE
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
700340* - Plasma Waves
Oscillations
& Instabilities- (1992-)