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Fabrication of an Antenna-Coupled Bolometer for Cosmic Microwave Background PolarimetryWe describe the development of a detector for precise measurements of the cosmic microwave background polarization. The detector employs a waveguide to couple light between a pair of Mo/Au superconducting transition edge sensors (TES) and a feedhorn. Incorporation of an on-chip ortho-mode transducer (OMT) results in high isolation. The OMT is micromachined and bonded to the microstrip and TES circuits in a low temperature wafer bonding process. The wafer bonding process incorporates a buried superconducting niobium layer with a single crystal silicon layer which serves as the leg isolated TES membrane and as the microstrip dielectric. We describe the micromachining and wafer bonding process and report measurement results of the microwave circuitry operating in the 29-43GHz band along with Johnson noise measurements of the TES membrane structures and development of Mo/Au TES operating under '00mK.
Document ID
20090026917
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Denis, K.L. (MEI Technologies, Inc. Seabrook, MD, United States)
Cao, N.T. (MEI Technologies, Inc. Seabrook, MD, United States)
Talley, D.J. (MEI Technologies, Inc. Seabrook, MD, United States)
Chuss, D.T. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Hinderks, J.R. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Hsieh, W-T (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Moseley, S.H. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Stevenson, T.R. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
U-yen, K. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Wollack, E.J. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Eimer, J. (Johns Hopkins Univ. Baltimore, MD, United States)
Date Acquired
August 24, 2013
Publication Date
July 20, 2009
Subject Category
Instrumentation And Photography
Meeting Information
Meeting: Low Temperature Detectors Workshop
Location: California
Country: United States
Start Date: July 20, 2009
End Date: July 24, 2009
Distribution Limits
Public
Copyright
Public Use Permitted.

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