The 110 GHz ECH installation on DII-D: Status and initial experimental results
- Univ. of Texas, Austin, TX (United States); and others
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 HE{sub 11} 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.
- Research Organization:
- General Atomics, San Diego, CA (United States); Univ. of Texas, Austin, TX (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research, Washington, DC (United States)
- DOE Contract Number:
- AC03-89ER51114; FG03-96ER54373; AC05-96OR22464
- OSTI ID:
- 484562
- Report Number(s):
- GA-A22584; CONF-970405-1; ON: DE97007605; TRN: 97:011299
- Resource Relation:
- Conference: 10. joint workshop on electron cyclotron emission and electron cyclotron resonance heating, Ameland (Netherlands), 6-11 Apr 1997; Other Information: PBD: May 1997
- Country of Publication:
- United States
- Language:
- English
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