Published January 25, 2008
| Version v1
Journal article
Observation of Reduced Electron-Temperature Fluctuations in the Core of H-Mode Plasmas
Creators
- 1. Department of Physics and Astronomy, University of California, Los Angeles, Los Angeles, California 90024-2704 (United States)
- 2. General Atomics, San Diego, California 92186-5608 (United States)
- 3. Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543-0451 (United States)
Description
Core electron-temperature fluctuations [0.5%≤T-tildee/Te≤2%, kθρs≤0.3 in neutral-beam-heated low confinement-mode (L-mode) plasmas] are observed to decrease by at least a factor of 4 in standard and quiescent high-confinement-mode (H-mode and QH-mode) regimes in the DIII-D tokamak (r/a=0.7). These fluctuations are attributed to ion temperature gradient (ITG) modes stabilized by rotational shear at the H-mode transition. The simultaneous reduction in electron heat diffusivity (χeQH/χeL<0.25) suggests that T-tildee fluctuations can contribute significantly to L-mode electron heat transport
Additional details
Identifiers
Publishing Information
- Journal Title
- Physical Review Letters
- Journal Volume
- 100
- Journal Issue
- 3
- Journal Page Range
- p. 035002-035002.4
- ISSN
- 0031-9007
- CODEN
- PRLTAO
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 39042780
- Subject category
- S70: PLASMA PHYSICS AND FUSION TECHNOLOGY;
- Descriptors DEI
- DOUBLET-3 DEVICE; ELECTRON TEMPERATURE; H-MODE PLASMA CONFINEMENT; HEAT TRANSFER; ION TEMPERATURE; L-MODE PLASMA CONFINEMENT; PLASMA; TEMPERATURE GRADIENTS
- Descriptors DEC
- CLOSED PLASMA DEVICES; CONFINEMENT; ENERGY TRANSFER; MAGNETIC CONFINEMENT; PLASMA CONFINEMENT; THERMONUCLEAR DEVICES; TOKAMAK DEVICES
Optional Information
- Notes
- (c) 2008 The American Physical Society