Scheduled System Maintenance:
Some services will be unavailable Sunday, March 29th through Monday, March 30th. We apologize for the inconvenience.
By Topic

Quench-induced dynamic breakdown strength of liquid helium for superconducting coils

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

The purchase and pricing options are temporarily unavailable. Please try again later.
3 Author(s)
Chigusa, S. ; Dept. of Electr. Eng., Nagoya Univ., Japan ; Hayakawa, N. ; Okubo, H.

In this paper we measured quench-induced dynamic breakdown strength of liquid helium (LHe) under various quench environment of superconducting (SC) coils for electrical insulation design of SC power equipment. Experimental results revealed that the dynamic breakdown strength of LHe drastically decreased with even small post-quench thermal energy of SC coils. However, the dynamic breakdown strength was improved with the increase in the pressure of LHe because of the suppression of thermal bubble disturbance in LHe. Moreover, we established 3-dimensional diagrams of the dynamic breakdown strength of LHe as a function of effective post-quench thermal energy density and pressure of LHe. The diagrams are applicable to the practical insulation design of SC equipment under quench environment.

Published in:

Applied Superconductivity, IEEE Transactions on  (Volume:10 ,  Issue: 1 )