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Category Archives: Research
Measurement of heat flux in multi-layer insulated helium cryostats after loss of insulating vacuum
The dimensioning of pressure relief devices (PRD) for cryogenic pressure equipment requires knowledge on the heat input at the maximum credible incident. In helium cryostats, this situation is typically defined by the loss of insulating vacuum (LIV), where the heat … Continue reading
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Molecular Dynamics Investigation On the Configuration And Shape of Helium Cluster in Tungsten
Abstract The stable configuration and shape of helium cluster in tungsten are investigated with molecular dynamics method. It is found that the configuration of helium cluster tends to form a near-spherical polyhedron. At high temperature, the Hen cluster for n … Continue reading
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Impact And Lifecycle of Superfluid Helium Drops On a Solid Surface
We have used high-speed video and interferometry to investigate the impact, spreading, and eventual contraction of superfluid 4He drops on a sapphire substrate in a saturated atmosphere of helium vapor. We find that the short-term kinetic spreading of superfluid drops … Continue reading
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Helium Beam Particle Therapy Facility
Due to its precision and limited side effects, the particle therapy of cancer is gaining popularity. The number of patients treated with protons and light ions reached 150,000 worldwide. There are currently more than 80 facilities, which often this treatment … Continue reading
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Cavity Evolution and the Rayleigh-Plesset Equation in Superfluid Helium
Based on the two-fluid hydrodynamics, an analog of the famous Rayleigh-Plesset equation for the dynamics of a spherical vapor bubble in superfluid helium is derived. The two-fluid nature of He II and the specific form of the momentum flux density … Continue reading
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