The position of liquid helium among other liquids is outlined. Discussions are included on the ground state at T = 0, the equilibrium theory of thermal excitations, and the hydrodynamics of these. Finally, some remarks on the theoretical dilficulties encountered in describing the thermal excitation...
Transfer lines forliquid heliumshould be well insulated and vacuum jacketed. 用于液氦的转移管应该隔热良好和带有真空夹层. 互联网 Never pourliquid heliumout of the container. 禁止把液氦从容器中倾倒出来. 互联网 The trail was as cold asliquid helium. ...
helium- a very light colorless element that is one of the six inert gasses; the most difficult gas to liquefy; occurs in economically extractable amounts in certain natural gases (as those found in Texas and Kansas) atomic number 2,He ...
The shock compression experiment of liquid helium is an available way to gain properties of specimen at high temperatures and pressures. Based on Fluent, a thermal insulation analysis and design of a liquid helium temperature target in the environment condition of 100 Pa for shock compression experim...
A Large-Scale Storage and Transfer System for Distribution of Liquid Helium as a Refrigerant Medium LIQUID HELIUMPRECOOLINGREFRIGERANTSREFRIGERATING EQUIPMENTTo prevent cavitation and overspeeding of the Centaur space vehicle engine turbo-pumps, the pump internals... JJ Gilbeau,DL Martindale,KR Burton -...
Fabry-Perot spectrometerA liquid helium cooled mid-infrared imaging Fabry-Perot spectrometer has been under development. A Si:P 5×5 detector array is used for this instrument. Although the array system has small format, but combination with JFET array will provide noise equivalent line flux of ...
A Bijl,JD Boer,A Michels 摘要: The theory of the degeneration phenomena of an ideal Bose-Einstein gas is modified so as to make it more in accordance with the thermal phenomena of liquid helium II. At the lowest temperatures the specific heat can be brought in agreement with the ...
be removed as thepressure is increased, but helium will freeze at –272.2°C, which is the lowest temperature scientistshave ever achieved. Second, it is an excellent conductor of heat. As a supercold liquid,it will move toward heat—even flow up the sides and over the top of a ...
The solubility of helium in liquid hydrogen has been measured as a function of temperature and pressure. It was found the solubility varied from 0.59 mole % for T=26.8°K and 1.98 atm partial pressure of helium to 11.1 mole % for T=19.8°K and 7.0 atm partial pressure of helium.关键词...