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Molecular contamination study by interaction of a molecular beam with a platinum surfaceThe capability of molecular beam scattering from a solid surface is analyzed for identification of molecular contamination of the surface. The design and setup of the molecular beam source and the measuring setup for the application of a phase sensitive measuring technique for the determination of the scattered beam intensity are described. The scattering distributions of helium and nitrogen molecular beams interacting with a platinum surface were measured for different amounts of contamination from diffusion pump oil for surface temperatures ranging from 30 to 400 C. The results indicate the scattering of molecular beams from a platinum surface is a very sensitive method for detecting surface contamination.
Document ID
19760011806
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Nuss, H. E. (NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Date Acquired
September 3, 2013
Publication Date
January 1, 1976
Subject Category
Atomic And Molecular Physics
Report/Patent Number
NASA-TM-X-58169
JSC-09951
Accession Number
76N18894
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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