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.
Prepared in cooperation with ARO, Inc., Tullahoma, Tenn. DOI: 10.21236/AD0641388