Open AccessGeneration and Demolishment Mechanisms of Vapor Bubble Around Hot Tungsten Filament in Superfluid Helium-4
Author(s) -
CheChi Shih,
MingHuei Huang,
Pang-Chia Chang,
Po-Wei Yu,
WenBin Jian,
Kimitoshi Kono
Publication year - 2021
Publication title -
journal of low temperature physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.598
H-Index - 67
eISSN - 1573-7357
pISSN - 0022-2291
DOI - 10.1007/s10909-020-02546-8
Subject(s) - protein filament , bubble , liquid helium , tungsten , condensed matter physics , helium , superfluidity , superfluid helium 4 , superheating , materials science , atomic physics , phase transition , ohmic contact , physics , nanotechnology , mechanics , layer (electronics) , metallurgy , composite material
The electric transport I – V characteristics of a tungsten filament immersed in superfluid helium are experimentally studied. The forward sweep I – V characteristics show an abrupt jump from the linear ohmic regime ( C state) to the high-resistance non-ohmic regime ( H state). In the H state, the filament is covered with a He gas bubble. In the C state, there is no gas bubble, that is, liquid He directly touches the filament surface. The transitions between these two states exhibit a well-developed hysteresis and bistability. The transition from the H state to the C state occurs at the equilibrium gas–liquid phase transition point, as reported by Date et al. (J Phys Soc Jpn 35(4):1190, 1973), whereas the C -to- H -state transition occurs in the superheat region.