A small, passively operated hydrogen maserThe paper describes a compact passive hydrogen maser with unique features including a reduction in size. It uses a passive operation mode, permitting the use of a small microwave TE(011) cavity dielectrically loaded by a low loss alumina. The Teflon coated quartz bulb common in other masers has been replaced by a Teflon coating on the inside wall of the cavity producing a simpler designed and a more rugged H-maser package. The cavity and the attached endcaps comprise the vacuum envelope, allowing the use of a single vacuum system. The dimensional stability of the ceramic cavity under barometric changes is sufficiently within the range of the electronic cavity servo so that a second vacuum system is not required. For temperature control, a single oven is located in the magnetic shield nest.
Document ID
19800056244
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Howe, D. A. (National Bureau of Standards Boulder, CO, United States)
Walls, F. L. (National Bureau of Standards Boulder, CO, United States)
Bell, H. E. (National Bureau of Standards Boulder, CO, United States)
Hellwig, H. (National Bureau of Standards, Frequency and Time Standards Group, Boulder Colo., United States)