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Development of a superconducting undulator cryostat based on the thermosiphon effect.

Author(s) : ZHANG X., XU M., CHEN Z., YANG X., ZHAO T., YE R., BIAN X., GAO Y., LU H., GE R., ZHU Z., LI Y.

Type of article: IJR article

Summary

As a specific device for light production, undulators have been researched and developed since the third generation of synchrotron photon sources. Nowadays, superconducting undulators become a research hotspot. However, the cryostat, which is used to create a liquid helium temperature environment, often causes the failure of the superconducting undulator. In this paper, a cryostat for a superconducting undulator is designed and investigated. First, a new refrigeration distribution is proposed that can provide more excess cooling capacity at 4.2 K temperature. For the cooling of the superconducting magnet, a liquid helium circulation loop based on the thermosiphon effect is designed, which has no pump or any other moving parts. Next, based on high-temperature superconducting technology, six binary current leads are used to decrease the heat load. The beam chamber is cooled below 20 K to reduce possible effect on the magnet. In addition, for the tubes that connect the 4.2 K helium tank to the room temperature component, the thermoacoustic oscillation is studied. In the experiment, the superconducting magnet could be cooled and maintained at 4.2 K depending on the thermosiphon loop. No helium was discharged when the magnet went through a quench which generated large heat in a short time. There was no liquid helium consumption and the excess cooling capacity reached 2.2 W. The maximum magnet current is as high as 470 A. This study can provide a valuable reference for the development of superconducting undulator cryostats.

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Pages: 86-94

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Details

  • Original title: Development of a superconducting undulator cryostat based on the thermosiphon effect.
  • Record ID : 30032405
  • Languages: English
  • Subject: Technology
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 164
  • Publication date: 2024/08
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2024.05.009

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