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AlMn Transition Edge Sensors for Advanced ACTPolAdvanced ACTPol (Adv ACT) will use an array of multichroic polarization sensitive AIMn transition edge sensor (TES) bolometers read out through time-division multiplexing. Aluminum doped with a low concentration of manganese can be deposited to a bulk film thickness for a more reliable superconducting critical temperature uniformity compared to thin bilayers. To build the TES, the AlMn alloy is deposited, over Nb wiring, to a specific thickness to set the TES normal resistance. The doping concentration of manganese coarsely defines the TES critical temperature, while a fine tuning is achieved by heating the deposited film to a specific temperature. The TES island is connected to the thermal bath via four silicon-nitride membranes, where their geometry defines the thermal conductance to the temperature of the bath. Lastly, the TES heat capacity is increased by addition of PdAu electrically connected to the AlMn film. Designs and performance characteristics of these AlMn TESs are presented for use in AdvACT.



Document ID
20160006709
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Li, Dale
(Stanford Linear Accelerator Center Menlo Park, CA, United States)
Austermann, Jason E.
(National Inst. of Standards and Technology Boulder, CO, United States)
Beall, James A.
(National Inst. of Standards and Technology Boulder, CO, United States)
Tucker, Daniel T.
(National Inst. of Standards and Technology Boulder, CO, United States)
Duff, Shannon M.
(National Inst. of Standards and Technology Boulder, CO, United States)
Gallardo, Patricio A.
(Cornell Univ. Ithaca, NY, United States)
Henderson, Shawn W.
(Cornell Univ. Ithaca, NY, United States)
Hilton, Gene C.
(National Inst. of Standards and Technology Boulder, CO, United States)
Ho, Shuay-Pwu
(Princeton Univ. Princeton, NJ, United States)
Hubmayr, Johannes
(National Inst. of Standards and Technology Boulder, CO, United States)
Koopman, Brian J.
(Cornell Univ. Ithaca, NY, United States)
McMahon, Jeffrey J.
(Michigan Univ. Ann Arbor, MI, United States)
Nati, Federico
(Pennsylvania Univ. Philadelphia, PA, United States)
Niemack, Michael D.
(Cornell Univ. Ithaca, NY, United States)
Pappas, Christine G.
(Princeton Univ. Princeton, NJ, United States)
Salatino, Maria
(Princeton Univ. Princeton, NJ, United States)
Schmitt, Benjamin L.
(Pennsylvania Univ. Philadelphia, PA, United States)
Simon, Sara M.
(Princeton Univ. Princeton, NJ, United States)
Staggs, Suzanne T.
(Princeton Univ. Princeton, NJ, United States)
Van Lanen, Jeff
(National Inst. of Standards and Technology Boulder, CO, United States)
Ward, Jonathan T.
(Pennsylvania Univ. Philadelphia, PA, United States)
Wollack, Edward J.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Date Acquired
May 31, 2016
Publication Date
February 17, 2016
Publication Information
Publication: Journal of Low Temperature Physics
Publisher: Springer
Volume: 184
Issue: 2-Jan
Subject Category
Astrophysics
Report/Patent Number
GSFC-E-DAA-TN32110
Funding Number(s)
CONTRACT_GRANT: NNX14AB58G
CONTRACT_GRANT: NNX13AE56G
Distribution Limits
Public
Copyright
Other
Keywords
Advanced ACTPol (AdvACT)
doping concentration
multichroic polarization

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