期刊
REVIEW OF SCIENTIFIC INSTRUMENTS
卷 87, 期 4, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4946896
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资金
- United States Department of Energy Office of Nuclear Physics
- Physics Division
- AOT Division
- STFC [ST/L006472/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/L006472/1] Funding Source: researchfish
- Direct For Mathematical & Physical Scien
- Division Of Physics [1506459] Funding Source: National Science Foundation
We have constructed an apparatus to study DC electrical breakdown in liquid helium at temperatures as low as 0.4 K and at pressures between the saturated vapor pressure and similar to 600 Torr. The apparatus can house a set of electrodes that are 12 cm in diameter with a gap of 1-2 cm between them, and a potential up to +/- 50 kV can be applied to each electrode. Initial results demonstrated that it is possible to apply fields exceeding 100 kV/cm in a 1 cm gap between two electropolished stainless steel electrodes 12 cm in diameter for a wide range of pressures at 0.4 K. We also measured the current between two electrodes. Our initial results, I < 1 pA at 45 kV, correspond to a lower bound on the effective volume resistivity of liquid helium of rho(V) > 5 x 10(18) Omega cm. This lower bound is 5 times larger than the bound previously measured. We report the design, construction, and operational experience of the apparatus, as well as initial results. Published by AIP Publishing.
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