Development of a liquid hydrogen transfer pump system with MgB 2 wires

Kazuhiro Kajikawa, Hirotsugu Kuga, Takuro Inoue, Kazuki Watanabe, Yushi Uchida, Taketsune Nakamura, Hiroaki Kobayashi, Motoyuki Hongo, Takayuki Kojima, Hideyuki Taguchi, Yoshihiro Naruo, Tsuyoshi Wakuda, Kazuhide Tanaka

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


An electric pump composed of an MgB 2 motor is combined with superconducting level sensors using thin CuNi-sheathed MgB 2 wires to transfer liquid hydrogen. An impeller is attached to the lower end of a rotating shaft on the MgB 2 motor and covered with an outer casing to form a centrifugal pump. Then, the MgB 2 motor and impeller are placed vertically inside a cryostat with an infill of liquid hydrogen. A glass Dewar vessel is prepared to receive the liquid hydrogen transferred from the cryostat containing the MgB 2 motor. The MgB 2 sensors are used not only to detect the level of liquid hydrogen but also to control the electric pump on the basis of their pre-estimated calibration curves. By using the assembled pump system, the liquid hydrogen is successfully transferred from the cryostat to the glass Dewar vessel via a transfer tube.

Original languageEnglish
Pages (from-to)615-619
Number of pages5
Issue number11
Publication statusPublished - Nov 2012

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Physics and Astronomy(all)


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