A HYDROGEN CONDENSATION PUMP

Journal Article · Mon Apr 01 04:00:00 EST 1957 · Ukrain. Fiz. Zhur.

OSTI ID:4039329

Lazaryev, B G; Borovik, E S; Fedorova, M F; Tsin, N M

An application is made of the fact that the vapor pressure of most gases pumped out with a high vacuum pump is very low (for example, for nitrogen p approx. equal 10/sup -10/ mm Hg). On this basis a method for obtaining high vacuum (10/sup -8/ to 10/sup -10/ mm Hg) is developed, by obtaining a high condensation rate of pumped gases on a surface cooled by liquid hydrogen. Two types of such pumps are investigated. One has a pumping rate of 13,000 1/sec with the pumping element inserted into the evacuated space, and the other has a pumping rate of about 4000 1/sec in the fom of a flanged unit inserted into the vacuum line gap between the evacuated object and the ordinary diffusion pump. The designs described can be employed with the usual vacuum technique (steel vacuum lines and recipients, rubber gasketed flanges, metal vacuum valves). (auth)

• Research Organization: Inst. of Physics and Tech., Academy of Sciences, USSR
• NSA Number: NSA-15-023613
• OSTI ID: 4039329
• Journal Information: Ukrain. Fiz. Zhur., Journal Name: Ukrain. Fiz. Zhur. Vol. Vol: 2
• Country of Publication: Country unknown/Code not available
• Language: Ukrainian

Related Subjects

ENGINEERING AND EQUIPMENT
FLANGES
GASES
GASKETS
HYDROGEN
LIQUEFYING
LIQUIDS
METALS
PLANNING
PRESSURE
PUMPS
STEELS
SURFACES
VACUUM
VALVES
VELOCITY
VESSELS