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Development of a vacuum leak test method for large-scale superconducting magnet test facilities.

[In Japanese. / En japonais.]

Author(s) : KAWANO K., HAMADA K., OKUNO K., et al.

Type of article: Article

Summary

Japan Atomic Agency (JAEA) has developed leak detection technology for liquid helium temperature experiments in large-scale superconducting magnet test facilities. In JAEA, a cryosorption pump that uses an absorbent cooled by liquid nitrogen with a conventional helium leak detector, is used to detect helium gas that is leaking from pressurized welded joints of pipes and valves in a vacuum chamber. The cryosorption pump plays the role of decreasing aerial components, such as water, nitrogen and oxygen, to increase the sensitivity of helium leak detection. A total of 850 welded and mechanical joints inside the cryogenics test facility for the ITER Central Solenoid Model Coil experiments have been tested. In the test facility, 73 units of glass fiber-reinforced plastic insulation break are used.

Details

  • Original title: [In Japanese. / En japonais.]
  • Record ID : 2006-2793
  • Languages: Japanese
  • Source: Journal of the Cryogenic Society of Japan - vol. 41 - n. 3
  • Publication date: 2006

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