Breakdown voltages of cryogenic gaseous helium and in liquid helium

Toshinobu Shigematsu, Hiroharu Kawasaki, Bunji Ono, Tatsuya Kawae

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)


As practical applications of superconductivity have been made in electric power engineering, the breakdown voltage superconductor coolants, such as liquid helium or supercritical helium, have been needed intensively. Furthermore, in our discharge experiment in liquid helium to search for a novel carbon nanotube structure, it was predicted that the breakdown voltage was much higher. So, using the metal spherical electrodes, d.c. breakdown voltages in 4.2K gaseous helium (just above the liquid helium) and in liquid helium have been measured. As a result of the experiment, it was observed that the value is several times larger. Moreover, it found that there was no difference in the discharge phenomenon before and after the superfluid transition temperature.

Original languageEnglish
Article number012005
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - Apr 19 2021
Event10th Asian Conference on Applied Superconductivity and Cryogenics, ACASC 2020, 2nd International Cryogenic Materials Conference in Asia, Asian-ICMC 2020 and CSSJ Joint Conference - Okinawa, Japan
Duration: Jan 6 2020Jan 9 2020

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)


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