Breakdown characteristics of He gas at cryogenic temperature and low pressure

Author

Irmisch, M. ; Ulbricht, A. ; Zwecker, V. ; Badent, R. ; Hinderer, A. ; Olbrisch, J. ; Jaarah, M.

Author_Institution

Kernforschungszentrum Karlsruhe, Inst. fuer Tech. Phys., Germany

Volume

28

Issue

4

fYear

1993

fDate

8/1/1993 12:00:00 AM

Firstpage

507

Lastpage

511

Abstract

The breakdown of He between plane electrodes was investigated under conditions similar to those of the operation of superconducting magnets at room temperature and 4 K. It was found that the breakdown voltage in the Paschen minimum was higher than expected at room temperature, which was explained by the presence of impurity. An additional effect observed, especially at low pressures, is that the measured pressure in the vacuum vessel does not seem to agree with the pressure of the electrode gap. Furthermore a helium leak of 1 Pa 1/s was introduced between the electrodes. No measurable influence of this leak was found within the measuring accuracy at low temperatures

Keywords

electric breakdown of gases; helium; He; Paschen minimum; breakdown voltage; cryogenic temperature; electrode gap; impurity; leak; measuring accuracy; plane electrodes; Coils; Cryogenics; Electric breakdown; Electrodes; Helium; Insulation; Magnetic field measurement; Pollution measurement; Superconducting magnets; Temperature;

fLanguage

English

Journal_Title

Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

0018-9367

Type

jour

DOI

10.1109/14.231533

Filename

231533