AN ABSOLUTE CRYOGENIC CALIBRATION SOURCE FOR A 2.5 GHZ RADIOMETER

Authors
GERVASI M BONELLI G SIRONI G CAVALIERE F PASSERINI A CASANI S
Citation
M. Gervasi et al., AN ABSOLUTE CRYOGENIC CALIBRATION SOURCE FOR A 2.5 GHZ RADIOMETER, Review of scientific instruments, 66(10), 1995, pp. 4798-4805
Citations number
23
Categorie Soggetti
Physics, Applied","Instument & Instrumentation
Journal title
Review of scientific instruments → ACNP
ISSN journal
00346748
Volume
66
Issue
10
Year of publication
1995
Pages
4798 - 4805
Database
ISI
SICI code
0034-6748(1995)66:10<4798:AACCSF>2.0.ZU;2-7
Abstract
We describe a liquid helium-cooled absolute reference load for the cal ibration of a. 2.5 GHz radiometer. This calibration system provides an absolute reference near the liquid helium boiling point. The accuracy of the reference source is better than 100 mK. We use this cold load to perform absolute temperature measurements of the cosmic microwave b ackground radiation. (C) 1995 American Institute of Physics.