A universal hydrogen and deuterium liquefier

The design is given of an economical H₂ and D₂ liquefier which works by the boiling off of liquid He vapour. The decisive role played by the gas condenser in the operation of the liquefier is demonstrated. The relationships between the flow rates of He and of the liquefied gas are calculated and measured. The helium consumption is 2.85 l for liquefying 1 l of H₂ and 3.8 1 l of D₂, which agrees with the calculations.     

A liquid hydrogen-deuterium target

The design of a liquid hydrogen-deuterium target is described in which the gas is liquefied at the expense of boiling off liquid He-vapour. A closed gas circulation system is used in the target; this increases the safety of operation and makes it easy to replace H₂ by D₂. The target design allows the use of detachable heads appropriate to the requirements of a specific experiment. The working time obtainable from one filling of helium is 80h for a liquid hydrogen target, (LHT) and 60 h for a liquid deuterium target (LDT). 2.85 I of liquid He are required to liquefy 1 I of H₂ and 3.8 l for 1 of D₂     

Methodical principles of multicriterial optimization of daily operating conditions of power equipment at thermal power stations

We describe a procedure for optimizing the long-and short-term operating conditions of the equipment at thermal power stations that is based on a multicriterial approach and takes into account the factors of economic efficiency, reliability, and maneuverability     

Thermal conductivity of a mixture of helium and air

The thermal conductivity of a helium-air mixture was measured for molar concentrations from 0 to 100%.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 38, No. 4, pp. 634–638, April, 1980.