Observations of Reduced Electron Gyroscale Fluctuations in National Spherical Torus Experiment H-Mode Plasmas with Large E X B Flow Shear
SCIE
SCOPUS
- Title
- Observations of Reduced Electron Gyroscale Fluctuations in National Spherical Torus Experiment H-Mode Plasmas with Large E X B Flow Shear
- Authors
- Smith, DR; Kaye, SM; Lee, W; Mazzucato, E; Park, HK; Bell, RE; Domier, CW; LeBlanc, BP; Levinton, FM; N. C. Luhmann, Jr.; Menard, JE; Yuh, H
- Date Issued
- 2009-06-05
- Publisher
- The American Physical Society
- Abstract
- Electron gyroscale fluctuation measurements in National Spherical Torus Experiment H-mode plasmas with large toroidal rotation reveal fluctuations consistent with electron temperature gradient (ETG) turbulence. Large toroidal rotation in National Spherical Torus Experiment plasmas with neutral beam injection generates ExB flow shear rates comparable to ETG linear growth rates. Enhanced fluctuations occur when the electron temperature gradient is marginally stable with respect to the ETG linear critical gradient. Fluctuation amplitudes decrease when the ExB flow shear rate exceeds ETG linear growth rates. The observations indicate that ExB flow shear can be an effective suppression mechanism for ETG turbulence.
- Keywords
- REVERSED MAGNETIC SHEAR; DIII-D DISCHARGES; TURBULENT FLUCTUATIONS; IMPROVED CONFINEMENT; SCATTERING SYSTEM; LOCAL TRANSPORT; TOKAMAK; NSTX; TFTR; HEAT
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/27614
- DOI
- 10.1103/PhysRevLett.102.225005
- ISSN
- 0031-9007
- Article Type
- Article
- Citation
- PHYSICAL REVIEW LETTERS, vol. 102, no. 22, page. 225005, 2009-06-05
- Files in This Item:
-
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.