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Title: Impurity toroidal rotation and transport in Alcator C-Mod ohmic high confinement mode plasmas

Abstract

Central toroidal rotation and impurity transport coefficients have been determined in Alcator C-Mod [I. H. Hutchinson et al., Phys. Plasmas 1, 1511 (1994)] Ohmic high confinement mode (H-mode) plasmas from observations of x-ray emission following impurity injection. Rotation velocities up to 3x10{sup 4} m/sec in the co-current direction have been observed in the center of the best Ohmic H-mode plasmas. Purely ohmic H-mode plasmas display many characteristics similar to ion cyclotron range of frequencies (ICRF) heated H-mode plasmas, including the scaling of the rotation velocity with plasma parameters and the formation of edge pedestals in the electron density and temperature profiles. Very long impurity confinement times ({approx}1 sec) are seen in edge localized mode-free (ELM-free) Ohmic H-modes and the inward impurity convection velocity profile has been determined to be close to the calculated neoclassical profile. (c) 2000 American Institute of Physics.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2]
  1. Plasma Science and Fusion Center, Massachusetts Institute of Technology, 175 Albany Street, Cambridge, Massachusetts 02139-4307 (United States)
  2. Plasma Science and Fusion Center, Massachusetts Institute of Technology, 175 Albany Street, Cambridge, Massachusetts 02139-4307 (United States) (and others)
Publication Date:
OSTI Identifier:
20216052
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 7; Journal Issue: 5; Other Information: PBD: May 2000; Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ALCATOR DEVICE; PLASMA IMPURITIES; PLASMA CONFINEMENT; 1-NITROSO-2-NAPHTHOL; PLASMA DENSITY; ROTATION; ELECTRON DENSITY; PLASMA HEATING; EXPERIMENTAL DATA; THEORETICAL DATA

Citation Formats

Rice, J. E., Goetz, J. A., Granetz, R. S., Greenwald, M. J., Hubbard, A. E., Hutchinson, I. H., Marmar, E. S., Mossessian, D., Pedersen, T. Sunn, and Snipes, J. A. Impurity toroidal rotation and transport in Alcator C-Mod ohmic high confinement mode plasmas. United States: N. p., 2000. Web. doi:10.1063/1.874004.
Rice, J. E., Goetz, J. A., Granetz, R. S., Greenwald, M. J., Hubbard, A. E., Hutchinson, I. H., Marmar, E. S., Mossessian, D., Pedersen, T. Sunn, & Snipes, J. A. Impurity toroidal rotation and transport in Alcator C-Mod ohmic high confinement mode plasmas. United States. doi:10.1063/1.874004.
Rice, J. E., Goetz, J. A., Granetz, R. S., Greenwald, M. J., Hubbard, A. E., Hutchinson, I. H., Marmar, E. S., Mossessian, D., Pedersen, T. Sunn, and Snipes, J. A. Mon . "Impurity toroidal rotation and transport in Alcator C-Mod ohmic high confinement mode plasmas". United States. doi:10.1063/1.874004.
@article{osti_20216052,
title = {Impurity toroidal rotation and transport in Alcator C-Mod ohmic high confinement mode plasmas},
author = {Rice, J. E. and Goetz, J. A. and Granetz, R. S. and Greenwald, M. J. and Hubbard, A. E. and Hutchinson, I. H. and Marmar, E. S. and Mossessian, D. and Pedersen, T. Sunn and Snipes, J. A.},
abstractNote = {Central toroidal rotation and impurity transport coefficients have been determined in Alcator C-Mod [I. H. Hutchinson et al., Phys. Plasmas 1, 1511 (1994)] Ohmic high confinement mode (H-mode) plasmas from observations of x-ray emission following impurity injection. Rotation velocities up to 3x10{sup 4} m/sec in the co-current direction have been observed in the center of the best Ohmic H-mode plasmas. Purely ohmic H-mode plasmas display many characteristics similar to ion cyclotron range of frequencies (ICRF) heated H-mode plasmas, including the scaling of the rotation velocity with plasma parameters and the formation of edge pedestals in the electron density and temperature profiles. Very long impurity confinement times ({approx}1 sec) are seen in edge localized mode-free (ELM-free) Ohmic H-modes and the inward impurity convection velocity profile has been determined to be close to the calculated neoclassical profile. (c) 2000 American Institute of Physics.},
doi = {10.1063/1.874004},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 5,
volume = 7,
place = {United States},
year = {2000},
month = {5}
}