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An absolute cryogenic calibration source for a 2.5 GHz radiometer

 

作者: M. Gervasi,   G. Bonelli,   G. Sironi,   F. Cavaliere,   A. Passerini,   S. Casani,  

 

期刊: Review of Scientific Instruments  （AIP Available online 1995）
卷期: Volume 66, issue 10  

页码: 4798-4805

 

ISSN:0034-6748

 

年代: 1995

 

DOI:10.1063/1.1146155

 

出版商: AIP

 

数据来源: AIP

 

摘要:

We describe a liquid helium‐cooled absolute reference load for the calibration 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 background radiation. ©1995 American Institute of Physics.

 

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