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

Conference · Mon Apr 01 00:00:00 EST 1991

OSTI ID:6039695

Petty, C C; Luce, T C; Lohr, J; Matsuda, K; Prater, R; Stockdale, R ^[1]; Hass, J C.M. de; James, R A ^[2]

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1. General Atomics, San Diego, CA (USA)
2. Lawrence Livermore National Lab., CA (USA)

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.

• Research Organization: General Atomics, San Diego, CA (USA)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (USA)
• DOE Contract Number: AC03-89ER51114; W-7405-ENG-48
• OSTI ID: 6039695
• Report Number(s): GA-A-20465; CONF-910609-8; ON: DE91011141
• 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

Related Subjects

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