Accession Number:

AD0641388

Title:

DESCRIPTION AND PERFORMANCE OF A MOLECULAR BEAM CHAMBER USED FOR CRYOPUMPING AND ADSORPTION PUMPING STUDIES

Descriptive Note:

Corporate Author:

ARO INC ARNOLD AFS TN

Personal Author(s):

• Brown, R. F.
• Heald, Jr, J. H.

Report Date:

1966-10-01

Pagination or Media Count:

36.0

Abstract:

An aerodynamic molecular beam chamber was constructed and operated. Design criteria, performance data, and space simulation applications are discussed. Cryopumping was utilized to provide the required pumping speed and to reduce the scattering of the beam by the background gas. A maximum beam intensity of 2.0 x 10 to the 20th power CO2 molecules per second per steradian was measured. The beam is now being used to study basic cryopumping phenomena on a microscopic scale and to provide capture coefficient data for immediate application in the design of cryopumping systems for space simulation chambers.

Descriptors:

• *CRYOPUMPING
• *MOLECULAR BEAMS
• *SPACE SIMULATION CHAMBERS
• *VACUUM PUMPS
• CARBON DIOXIDE
• INSTRUMENTATION
• MODULATION
• NOZZLES
• PERFORMANCE(ENGINEERING)
• RAREFIED GAS DYNAMICS
• SCATTERING

Subject Categories:

• Test Facilities, Equipment and Methods

Distribution Statement:

APPROVED FOR PUBLIC RELEASE