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X-Band Ultra-Low Noise Maser Amplifier PerformanceNoise temperature measurements of an 8440 MHz ultra-low noise maser amplifier (ULNA) have been performed at sub-atmospheric, liquid helium temperatures. The traveling wave maser operated while immersed in a liquid helium bath. The lowest input noise temperature measured was 1.23 plus or minus 0.16 K at a physical temperature of 1.60 kelvin. At this physical temperature the observed gain per unit length of ruby was 4.6 dB/cm, and the amplifier had a 3 dB-bandwidth of 76 MHz.
Document ID
20060038987
Acquisition Source
Jet Propulsion Laboratory
Document Type
Preprint (Draft being sent to journal)
External Source(s)
hdl:2014/35335
Authors
Glass, G.
Johnson, D.
Ortiz, G.
Date Acquired
August 23, 2013
Publication Date
May 16, 1993
Subject Category
Lasers And Masers
Distribution Limits
Public
Copyright
Other
Keywords
ultra-low noise maser amplifier X-band maser system

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