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Title: Modification of the Current Profile in DIII-D by Off-Axis Electron Cyclotron Current Drive

Abstract

Localized non-inductive currents due to electron cyclotron wave absorption have been measured on the DIII-D tokamak. Clear evidence of the non-inductive currents is seen on the internal magnetic field measurements by motional Stark effect spectroscopy. The magnitude and location of the non-inductive current is evaluated by comparing the total and Ohmic current profiles of discharges with and without electron cyclotron wave power. The measured current agrees with Fokker-Planck calculations near the magnetic axis, but exceeds the predicted value as the location of the current drive is moved to the half radius.

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
General Atomics, San Diego, CA (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
767040
Report Number(s):
GA-A23167
TRN: US0110762
DOE Contract Number:  
AC03-99ER54463; W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: 26th European Conference on Controlled Fusion and Plasma Physics, Maastricht (NL), 06/14/1999--06/18/1999; Other Information: PBD: 1 Jul 1999
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; DOUBLET-3 DEVICE; MAGNETIC FIELDS; MODIFICATIONS; STARK EFFECT; NON-INDUCTIVE CURRENT DRIVE; FOKKER-PLANCK EQUATION

Citation Formats

Luce, T C, Lin-Liu, Y R, Harvey, R W, Giruzzi, G, Lohr, J M, Petty, C C, Politzer, P A, Prater, R, and Rice, B W. Modification of the Current Profile in DIII-D by Off-Axis Electron Cyclotron Current Drive. United States: N. p., 1999. Web.
Luce, T C, Lin-Liu, Y R, Harvey, R W, Giruzzi, G, Lohr, J M, Petty, C C, Politzer, P A, Prater, R, & Rice, B W. Modification of the Current Profile in DIII-D by Off-Axis Electron Cyclotron Current Drive. United States.
Luce, T C, Lin-Liu, Y R, Harvey, R W, Giruzzi, G, Lohr, J M, Petty, C C, Politzer, P A, Prater, R, and Rice, B W. 1999. "Modification of the Current Profile in DIII-D by Off-Axis Electron Cyclotron Current Drive". United States. https://www.osti.gov/servlets/purl/767040.
@article{osti_767040,
title = {Modification of the Current Profile in DIII-D by Off-Axis Electron Cyclotron Current Drive},
author = {Luce, T C and Lin-Liu, Y R and Harvey, R W and Giruzzi, G and Lohr, J M and Petty, C C and Politzer, P A and Prater, R and Rice, B W},
abstractNote = {Localized non-inductive currents due to electron cyclotron wave absorption have been measured on the DIII-D tokamak. Clear evidence of the non-inductive currents is seen on the internal magnetic field measurements by motional Stark effect spectroscopy. The magnitude and location of the non-inductive current is evaluated by comparing the total and Ohmic current profiles of discharges with and without electron cyclotron wave power. The measured current agrees with Fokker-Planck calculations near the magnetic axis, but exceeds the predicted value as the location of the current drive is moved to the half radius.},
doi = {},
url = {https://www.osti.gov/biblio/767040}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Jul 01 00:00:00 EDT 1999},
month = {Thu Jul 01 00:00:00 EDT 1999}
}

Conference:
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