Accession Number : ADP002452

Title :   Cold Hydrogen Maser Research at SAO (Smithsonian Astrophysical Observatory) and Related Developments,

Corporate Author : SMITHSONIAN ASTROPHYSICAL OBSERVATORY CAMBRIDGE MA

Personal Author(s) : Vessot,R. F. C. ; Mattison,E. M. ; Imbier,E.

Report Date : 1983

Pagination or Media Count : 6

Abstract : The cryogenically-cooled maser provides a means for measuring frequency shifts and relaxation properties of storage wall coating materials that can be frozen in place from substances normally in the gaseous phase. We report initial measurements for FEP-120 Teflon between 77K and 48K and compare them with the 372K to 77K data of de Saintfuscien. Some of the design features of the maser are described. The cryomaser's hydrogen dissociator is located entirely within the vacuum enclosure and operates at 77K. The in-vacuum dissociator and other developments that have been adapted and tested in a room temperature maser, and that are applicable for both space and terrestrial use, are also discussed. (Author)

Descriptors :   *Masers, *Frequency standards, Hydrogen, Cryogenics, Measurement, Plastic coatings, Atomic properties, Frequency

Distribution Statement : APPROVED FOR PUBLIC RELEASE