The 110 GHz ECH installation on DII-D [electronic resource] : Status and initial experimental results.
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| Online Access: |
Online Access |
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| Corporate Author: | |
| Format: | Government Document Electronic eBook |
| Language: | English |
| Published: |
Washington, D.C. : Oak Ridge, Tenn. :
United States. Dept. of Energy. Office of Energy Research ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy,
1997.
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| Abstract: | Two 110 GHz gyrotrons with nominal output power of 1 MW each have been installed on the DIII-D tokamak. The gyrotrons, produced by Gycom and Communications and Power Industries, are connected to the tokamak by windowless evacuated transmission lines using circular corrugated waveguide carrying the HE₁₁ mode. Initial experiments with the Gycom gyrotron showed good central heating efficiency at the second harmonic resonance with record central electron temperatures for DIII-D in excess of 10 keV achieved. The beam spot in the DIII-D vacuum vessel was well focused, with a diameter of approximately 8 cm, and it could be steered poloidally by a remotely adjustable mirror. The injection was at 19 deg off-perpendicular for current drive and the beams could be modulated for studies of energy transport and power deposition. The system will be described and the initial physics results will be presented. A third gyrotron, also at 110 GHz, will be installed later this year. Progress with this CPI tube will be discussed and future plans for the ECH installation and physics experiments using it will be presented. |
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| Item Description: | Published through the Information Bridge: DOE Scientific and Technical Information. 05/01/1997. "GA--A22584" "CONF-970405--1" "DE97007605" 10. joint workshop on electron cyclotron emission and electron cyclotron resonance heating, Ameland (Netherlands), 6-11 Apr 1997. Callis, R.W.; Lohr, J.; ÒNeill, R.C. General Atomics, San Diego, CA (United States) Texas Univ., Austin, TX (United States) |
| Physical Description: | 16 p. |