- Bejan, A. and Cluss, E. M. Jr., CRITERION FOR BURN-UP CONDITIONS IN GAS-COOLED CRYOGENIC CURRENT LEADS.,
Cryogenics, vol. 16 no. 9
pp. 515 - 518 [0011-2275(76)90297-6] .
(last updated on 2007/04/08)
Superconducting magnets are energized through helium vapor-cooled cryogenic current leads operating at high ratios of current to mass flow. The high current operation where lead temperature, runaway, and eventual burn-up are likely to occur is investigated. A simple criterion for estimating the burn-up operation conditions (current, mass flow) for a given lead geometry (cross-sectional area, length, heat exchanger area) is presented. This article stresses the role played by the available heat exchanger area in avoiding burn-up at high ratios of current to mass flow.