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Characteristics Measurements of Supersensitive Direct Detector Receivers of Submillimeter Waveband Region Using Planck Radiation Source

Authors:
Alexander N. Vystavkin, Andrey V. Pestriakov, Eugeny A. Vinogradov
Abstract:
A blackbody radiating at the temperatures and frequencies corresponding to the relationship T ~ hw/k which is valid when the radiation power spectral density is described by the Planck formula, is considered. This blackbody is used to measure the spectral characteristics and noise equivalent power of low-temperature (T ~ 0.3…0.1 K) direct detectors. The above relationship corresponds to the submillimeter waveband and temperatures ranging from several Kelvins to 40…50 K. It is suggested that the blackbody be placed in the cryostat cold area near a direct detector to prevent external thermal radiation which may overheat a low temperature refrigerator being employed. A measurement technique is developed which involves a Fredholm equation of the first kind and regularization methods.
Categories:
Detectors, Poster Session
Year:
2005
Session:
5B
Full-text:
Download a PDF of this paper.
Page Number(s):
126-129