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Title: Non-diffusive heat transport during electron cyclotron heating on the DIII-D tokamak

Abstract

Of central importance to magnetic confinement fusion is the understanding of cross-field heat transport, which is usually modeled as a diffusive process down a temperature gradient with a small additional convective term due to particle transport. This paper reports results from off-axis electron cyclotron heating (ECH) experiments which cannot be adequately described in this framework. In particular, net heat appears to be flowing up the temperature gradient in the electron channel. Electron cyclotron heating experiments at 60 GHz have been carried out in the DIII-D tokamak with launched power levels up to 1.4 MW. The ECH launch system, located on the inside wall at z = +13 cm, launches the extraordinary X-mode in a Gaussian pattern with a 12{degrees} half width. Eight antennas direct their power at 15{degrees} and two antennas direct their power at {plus minus}30{degrees} with respect to the major radius. The orientation is such to drive current aiding the Ohmic current for normal operation. 5 refs., 5 figs.

Authors:
; ; ; ; ;  [1]; ;  [2]
  1. General Atomics, San Diego, CA (USA)
  2. Lawrence Livermore National Lab., CA (USA)
Publication Date:
Research Org.:
General Atomics, San Diego, CA (USA)
Sponsoring Org.:
USDOE; USDOE, Washington, DC (USA)
OSTI Identifier:
6039695
Report Number(s):
GA-A-20465; CONF-910609-8
ON: DE91011141
DOE Contract Number:  
AC03-89ER51114; W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: 18. European conference on controlled fusion and plasma physics, Berlin (Germany, F.R.), 3-7 Jun 1991
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; DOUBLET REACTORS; ECR HEATING; HEAT TRANSFER; ANTENNAS; ELECTRON TEMPERATURE; MAGNETIC SURFACES; TEMPERATURE GRADIENTS; ELECTRICAL EQUIPMENT; ENERGY TRANSFER; EQUIPMENT; HEATING; HIGH-FREQUENCY HEATING; MAGNETIC FIELD CONFIGURATIONS; PLASMA HEATING; THERMONUCLEAR REACTORS; TOKAMAK TYPE REACTORS; 700101* - Fusion Energy- Plasma Research- Confinement, Heating, & Production; 700103 - Fusion Energy- Plasma Research- Kinetics

Citation Formats

Petty, C C, Luce, T C, Lohr, J, Matsuda, K, Prater, R, Stockdale, R, Hass, J C.M. de, and James, R A. Non-diffusive heat transport during electron cyclotron heating on the DIII-D tokamak. United States: N. p., 1991. Web.
Petty, C C, Luce, T C, Lohr, J, Matsuda, K, Prater, R, Stockdale, R, Hass, J C.M. de, & James, R A. Non-diffusive heat transport during electron cyclotron heating on the DIII-D tokamak. United States.
Petty, C C, Luce, T C, Lohr, J, Matsuda, K, Prater, R, Stockdale, R, Hass, J C.M. de, and James, R A. 1991. "Non-diffusive heat transport during electron cyclotron heating on the DIII-D tokamak". United States.
@article{osti_6039695,
title = {Non-diffusive heat transport during electron cyclotron heating on the DIII-D tokamak},
author = {Petty, C C and Luce, T C and Lohr, J and Matsuda, K and Prater, R and Stockdale, R and Hass, J C.M. de and James, R A},
abstractNote = {Of central importance to magnetic confinement fusion is the understanding of cross-field heat transport, which is usually modeled as a diffusive process down a temperature gradient with a small additional convective term due to particle transport. This paper reports results from off-axis electron cyclotron heating (ECH) experiments which cannot be adequately described in this framework. In particular, net heat appears to be flowing up the temperature gradient in the electron channel. Electron cyclotron heating experiments at 60 GHz have been carried out in the DIII-D tokamak with launched power levels up to 1.4 MW. The ECH launch system, located on the inside wall at z = +13 cm, launches the extraordinary X-mode in a Gaussian pattern with a 12{degrees} half width. Eight antennas direct their power at 15{degrees} and two antennas direct their power at {plus minus}30{degrees} with respect to the major radius. The orientation is such to drive current aiding the Ohmic current for normal operation. 5 refs., 5 figs.},
doi = {},
url = {https://www.osti.gov/biblio/6039695}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Apr 01 00:00:00 EST 1991},
month = {Mon Apr 01 00:00:00 EST 1991}
}

Conference:
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