Abstract
Liquid and gaseous helium are used both as a coolant and dielectric material in superconducting magnets and superconducting power transmission lines. The dielectric strength of helium at 4.2 K and above has been investigated extensively [1–4]. Recently, superfluid helium at 1.8 K has been proposed for cooling superconductive magnets [5] because higher critical current and better heat transfer can be obtained. Charging or discharging superconductive magnets generate inhomo- geneous electric fields between the magnet turns and the surrounding dewar which require the superfluid helium to function as a high-voltage insulator. High-current leads are cooled and electrically insulated with helium vapor. Therefore, knowledge of the dielectric strength for vapor and liquid helium near 1.8 K is essential.
Work supported by U. S. Energy Research and Development Administration.
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© 1978 Plenum Press · New York and London
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Hwang, K.F. (1978). Dielectric Strength of Helium Vapor and Liquid at Temperatures between 1.4 and 4.2 K. In: Timmerhaus, K.D. (eds) Advances in Cryogenic Engineering. Advances in Cryogenic Engineering, vol 23. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-4039-3_13
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DOI: https://doi.org/10.1007/978-1-4613-4039-3_13
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