Accession Number:

AD0475236

Title:

DESIGN AND DEVELOPMENT OF A CRYOGENIC PUMPING EVALUATION FACILITY.

Descriptive Note:

Master's thesis,

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s):

• Albero, Carl M.

Report Date:

1965-01-01

Pagination or Media Count:

62.0

Abstract:

A cryogenic pump is a cold surface employed to remove large volumes of gases from a vacuum system by condensing and freezing the gas molecules. Experimental results are presented for the cryopumping rate of carbon dioxide gas on a surface cooled by liquid nitrogen, and for nitrogen gas on a surface cooled by liquid helium. The nature of the problems encountered in the design and construction of a cryogenic pumping system are also discussed. Author

Descriptors:

• *VACUUM PUMPS
• *CRYOPUMPING
• CRYOGENICS
• GASES
• FREEZING
• CARBON DIOXIDE
• NITROGEN
• COOLING
• SURFACES
• LIQUEFIED GASES
• HELIUM
• KINETIC THEORY
• HEAT SHIELDS
• THERMAL RADIATION
• PRESSURE
• MEASUREMENT
• IONIZATION GAGES
• RECORDING SYSTEMS
• THERMOCOUPLES
• THERMISTORS
• FLOWMETERS
• STATISTICAL ANALYSIS
• RELIABILITY
• EXPERIMENTAL DATA

Subject Categories:

• Pumps, Filters, Pipes, Tubing, Fittings and Valves

Distribution Statement:

APPROVED FOR PUBLIC RELEASE