Leak-checking and testing of the first Ying--Yang magnet for the Mirror Fusion Test Facility (MFTF)
Leak-testing and leak-reporting techniques used on the MFTF yin--yang magnet for the world's largest superconducting coil are reported. Based on this experience, techniques will be developed for leak-testing techniques to be employed on the 24 MFTF-B coils. Additional information is presented on MFTF magnet operation after the completion of these tests. Also described are the leak-hunting techniques and their results when applied to the two liquid-helium circuits (the coil bundle and guard vacuum: both require helium flow for magnet cooldown), their associated piping, liquid-nitrogen radiation shield, and piping. Leak hunting and repair was started in July 1981, when the installation of the magnet liner radiation shields was completed and continued until acceptable leak-rate requirements were met in December 1981. Cooldown and acceptance testing of the magnet was accomplished in January and February 1982.
- Research Organization:
- Magnet Group, MFTF Project, Lawrence Livermore National Laboratory, Livermore, California 94550
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 5769041
- Journal Information:
- J. Vac. Sci. Technol., A; (United States), Vol. 1:2
- Country of Publication:
- United States
- Language:
- English
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71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
MFTF DEVICES
SUPERCONDUCTING MAGNETS
LEAK TESTING
LEAK DETECTORS
ELECTRICAL EQUIPMENT
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EQUIPMENT
MAGNETIC MIRRORS
MAGNETS
OPEN PLASMA DEVICES
SUPERCONDUCTING DEVICES
TESTING
THERMONUCLEAR DEVICES
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420201 - Engineering- Cryogenic Equipment & Devices