Analysis of sawtooth oscillations using simultaneous measurement of electron cyclotron emission imaging and x-ray tomography on TFTR

Journal Article · Sun Dec 15 23:00:00 EST 1991 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.67.3527· OSTI ID:6092372

Nagayama, Y; McGuire, K M; Bitter, M; Cavallo, A; Fredrickson, E D; Hill, K W; Hsuan, H; Janos, A; Park, W; Taylor, G; Yamada, M ^[1]

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1. Princeton Plasma Physics Laboratory, P. O. Box 451, Princeton, New Jersey 08543 (United States)

High-resolution electron cyclotron emission and x-ray image reconstructions have been made simultaneously during the sawtooth crash in the fast rotating plasma with neutral beam injection heating on TFTR. The measured x-ray emission is identical as metal impurity radiation. The results suggest that the sawtooth crash is a full reconnection process of the TFTR sawteeth. The crescent shaped hot spot'' in the x-ray emissivity is found not to present flux surfaces. New features are observed during the sawtooth crash, such as an oval-shaped hot spot and a cooler region between the island and the hot spot.

• DOE Contract Number: AC02-76CH03073
• OSTI ID: 6092372
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 67:25; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700330* -- Plasma Kinetics
Transport
& Impurities-- (1992-)
700400 -- Fusion Technology-- (1992-)
700430 -- Fusion Technology-- Magnet Coils & Fields-- (1992-)
BEAM INJECTION
BREMSSTRAHLUNG
CHROMIUM
CLOSED PLASMA DEVICES
CYCLOTRON RADIATION
DATA
DIAGNOSTIC TECHNIQUES
ELECTROMAGNETIC RADIATION
ELECTRON TEMPERATURE
ELECTRONS
ELEMENTARY PARTICLES
ELEMENTS
EMISSION
EXPERIMENTAL DATA
FERMIONS
IMAGE PROCESSING
IMPURITIES
INFORMATION
IONIZING RADIATIONS
IRON
LEPTONS
METALS
NEUTRAL ATOM BEAM INJECTION
NICKEL
NUMERICAL DATA
OSCILLATIONS
PLASMA
PLASMA DIAGNOSTICS
PROCESSING
RADIATIONS
RESOLUTION
ROTATING PLASMA
SAWTOOTH OSCILLATIONS
SPECTRA
TFTR TOKAMAK
THERMONUCLEAR DEVICES
TIME RESOLUTION
TIMING PROPERTIES
TOKAMAK DEVICES
TOMOGRAPHY
TRANSITION ELEMENTS
X RADIATION
X-RAY SPECTRA