Helium vapor-cooled brass current leads: Experimental and analytical results

Haigun Lee, Paul Arakawa, Kenneth R. Efferson, Yukikazu Iwasa

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


This paper presents experimental and analytical results of a pair of helium vapor-cooled brass leads having a rated current, It, of 40 A, operated continuously below, at, and above 40 A. In Regime 1 (0<I≤It), the leads operate stably sustained by cooling that increases with I, in agreement with a theory originally developed for copper leads and modified for brass leads. In Regime 2 (It<I<I2c, where I2c is an upper limit current), the leads also operate stably. A simple theory has been developed to elucidate this stable operation in Regime 2. In addition to the original cooling term valid for Regime 1, the theory includes another term that increases as I2. Agreement between theory and experiment for both regimes is quite good.

Original languageEnglish
Pages (from-to)485-489
Number of pages5
Issue number7
Publication statusPublished - 2001
Externally publishedYes

ASJC Scopus subject areas

  • General Materials Science
  • General Physics and Astronomy


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