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Integrated Electron-tunneling Refrigerator and TES Bolometer for Millimeter Wave AstronomyWe describe progress in the development of a close-packed array of bolometers intended for use in photometric applications at millimeter wavelengths from ground- based telescopes. Each bolometer in the may uses a proximity-effect Transition Edge Sensor (TES) sensing element and each will have integrated Normal-Insulator-Superconductor (NIS) refrigerators to cool the bolometer below the ambient bath temperature. The NIS refrigerators and acoustic-phonon-mode-isolated bolometers are fabricated on silicon. The radiation-absorbing element is mechanically suspended by four legs, whose dimensions are used to control and optimize the thermal conductance of the bolometer. Using the technology developed at NIST, we fabricate NIS refrigerators at the base of each of the suspension legs. The NIS refrigerators remove hot electrons by quantum-mechanical tunneling and are expected to cool the biased (approx.10 pW) bolometers to <170 mK while the bolometers are inside a pumped 3He-cooled cryostat operating at approx.280 mK. This significantly lower temperature at the bolometer allows the detectors to approach background-limited performance despite the simple cryogenic system.
Document ID
20050210161
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Silverberg, R. F.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Benford, D. J.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Chen, T. C.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Chervenak, J.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Finkbeiner, F.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Moseley, S. H.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Duncan, W.
(National Inst. of Standards and Technology Boulder, CO, United States)
Miller, N.
(National Inst. of Standards and Technology Boulder, CO, United States)
Schmidt, D.
(National Inst. of Standards and Technology Boulder, CO, United States)
Ullom, J.
(National Inst. of Standards and Technology Boulder, CO, United States)
Date Acquired
August 23, 2013
Publication Date
January 1, 2005
Subject Category
Astronomy
Meeting Information
Meeting: Low Temperature Detector Conference
Location: Tokyo
Country: Japan
Start Date: July 31, 2005
End Date: August 5, 2005
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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