Published September 1996
| Version v1
Report
A cryogenic system for HT-7 tokamak
Description
The superconducting toroidal magnet of tokamak HT-7 is cooled with supercritical/two-phase helium flow. A 500W/4.5K refrigerator with four piston expanders supplies the mass flow. The HT-7 cryogenic system was complete in July 1994. Since then the tokamak has been cooled down five times successfully for the primary test, engineering tests and normal plasma physics experiments. The last operation status confirmed that the system has some capacity margin to back up the magnet steady operation at the toroidal fields of 1.5-2.0 T range for a long term. A plasma current of 140 kA amplitude and 1.3s pulse duration was achieved in March 1996. (author)
Additional details
Publishing Information
- Imprint Title
- Proceedings of the symposium on cryogenic systems for large scale superconducting applications
- Imprint Pagination
- 223 p.
- Journal Page Range
- p. 81-84.
- Report number
- NIFS-PROC--28
Conference
- Title
- Symposium on cryogenic systems for large scale superconducting applications.
- Dates
- 27-29 May 1996.
- Place
- Toki, Gifu (Japan).
INIS
- Country of Publication
- Japan
- Country of Input or Organization
- Japan
- INIS RN
- 28066366
- Subject category
- S70: PLASMA PHYSICS AND FUSION TECHNOLOGY; S71: CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- CHINA; CIRCULATING SYSTEMS; CRYOGENICS; ENERGY LOSSES; FORCED CONVECTION; NIOBIUM ALLOYS; PERFORMANCE TESTING; REFRIGERATION; SUPERCONDUCTING MAGNETS; TITANIUM; TOKAMAK DEVICES
- Descriptors DEC
- ALLOYS; ASIA; CLOSED PLASMA DEVICES; CONVECTION; COOLING; ELECTRICAL EQUIPMENT; ELECTROMAGNETS; ELEMENTS; ENERGY TRANSFER; EQUIPMENT; HEAT TRANSFER; MAGNETS; METALS; SUPERCONDUCTING DEVICES; TESTING; THERMONUCLEAR DEVICES; TRANSITION ELEMENT ALLOYS; TRANSITION ELEMENTS