Selecting materials and hardware

AUG 01, 1972

Gaskets, joints, lubricants and other components must be easily cleanable, unharmed by high temperature and chemically nonreactive; some substances approach this ideal better than others.

DOI: 10.1063/1.3070961

William R. Wheeler

The primary function of very high and ultrahigh vacuum equipment is to provide an environment that is superbly nonreactive: so neutral that molecular, electron and other submolecular beams can travel uninhibited; that chemically reactive metals can be heated to any temperature and be improved rather than degraded; that physiochemical reactions can be precisely controlled without contamination problems.

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References

1. D. J. Santeler. D. H. Holkeboer, D. W. Jones, F. Pagano, Vacuum Engineering, Boston Technical Publishers, Inc. Cambridge (1967) page 201.
2. Y. Strausser, Technical Report VR‐51, Varian Associates, Palo Alto, Calif.
3. A. C. Phillips, Welding Handbook, American Welding Society (1958) page 27.3.
4. T. H. Batzer, J. F. Ryan, Transactions of the 16th National Vacuum Symposium, Macmillan, New York (1963).

More about the Authors

William R. Wheeler. Components Development with Varian Associates Vacuum Division, Palo Alto, Calif..