Outgassing of the lower hybrid current drive antenna on JT-60U
Creators
- 1. Japan Atomic Energy Research Inst., Naka, Ibaraki (Japan). Naka Fusion Research Establishment
Description
The outgassing properties of the lower hybrid current drive (LHCD) antenna during r.f. operation were studied on the JT-60U tokamak. The antenna is not equipped with a differential pumping system to evacuate the outgassing of the antenna. The pressure rise in the antenna during r.f. operation strongly depended on the r.f. power when r.f. conditioning was started. However, the outgassing rate was quickly reduced after several shots, and showed weak r.f. power dependence after sufficient r.f. conditioning. Finally, the outgassing rate of the LHCD antenna was in the range of approximately 10-6Pam3s-1m-2 after four weeks operation at the working temperature of 250 C. Then a power density of up to 25MWm-2 was successfully injected into the plasma without the differential pumping system at the antenna on JT-60U. (orig.)
Additional details
Publishing Information
- Journal Title
- Fusion Engineering and Design
- Journal Volume
- 30
- Journal Issue
- 3
- Journal Page Range
- p. 253-259.
- ISSN
- 0920-3796
- CODEN
- FEDEEE
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- Netherlands
- INIS RN
- 27055155
- Subject category
- S70: PLASMA PHYSICS AND FUSION TECHNOLOGY; S70: PLASMA PHYSICS AND FUSION TECHNOLOGY; S70: PLASMA PHYSICS AND FUSION TECHNOLOGY;
- Descriptors DEI
- ANTENNAS; DEGASSING; JT-60U TOKAMAK; LOWER HYBRID CURRENT DRIVE; POWER DENSITY
- Descriptors DEC
- CLOSED PLASMA DEVICES; ELECTRICAL EQUIPMENT; EQUIPMENT; NON-INDUCTIVE CURRENT DRIVE; THERMONUCLEAR DEVICES; TOKAMAK DEVICES