Accession Number : ADA305578

Title :   Compact Hydrogen Maser with a High Temperature Superconductor-Based Cavity.

Descriptive Note : Final rept. 15 Aug 93-14 Aug 95,

Corporate Author : PHYSICAL SCIENCES INC ANDOVER MA

Personal Author(s) : Read, Michael E.

PDF Url : ADA305578

Report Date : FEB 1996

Pagination or Media Count : 73

Abstract : The goal of the program was the demonstration of the feasibility of a compact hydrogen maser by use of a high temperature superconductor (HTS)-based cavity. The cavity was of the "lumped element" type, with dimensions about 1/4 those of the TE(sub 01) cylindrical cavity normally used. A coating of HTS on the cavity electrodes was used to increase the Q from about 5,000 for copper to a value over 25,000 for which masing would occur. The maser was design and fabricated, overcoming a number of difficult problems, most of which were associated with operation at cryogenic temperatures. Limitations on resources prevented significant testing. However, given the difficulties discovered during the design and fabrication, it was determined that the commercial viability of the compact maser was doubtful, and no further effort toward development was anticipated. The program was very useful in enhancing the maser-related technology base at Physical Sciences Inc. (PSI). This technology has been directly applied to the development of a novel rubidium maser that is expected to have a strong commercial market. jg p1

Descriptors :   *CAVITIES, *HYDROGEN, *HIGH TEMPERATURE SUPERCONDUCTORS, *MASERS, *COMPACTING, LOW TEMPERATURE, MARKETING, COATINGS, FEASIBILITY STUDIES, CYLINDRICAL BODIES, COPPER, ELECTRODES, VIABILITY, OPERATION, RESOURCES, CRYOGENICS, PHYSICAL SCIENCES, RUBIDIUM.

Subject Categories : Lasers and Masers
      Inorganic Chemistry
      Electricity and Magnetism
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE