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Implications of Weak Link Effects on Thermal Characteristics of Transition-Edge SensorsWeak link behavior in transition-edge sensor (TES) microcalorimeters creates the need for a more careful characterization of a device's thermal characteristics through its transition. This is particularly true for small TESs where a small change in the bias current results in large changes in effective transition temperature. To correctly interpret measurements, especially complex impedance, it is crucial to know the temperature-dependent thermal conductance, G(T), and heat capacity, C(T), at each point through the transition. We present data illustrating these effects and discuss how we overcome the challenges that are present in accurately determining G and T from I-V curves. We also show how these weak link effects vary wi.th TES size. Additionally, we use this improVed understanding of G(T) to determine that, for these TES microcalorimeters. Kaptiza boundary resistance dominates the G of devices with absorbers while the electron-phonon coupling also needs to be considered when determining G for devices without absorbers
Document ID
20120015534
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Bailey, C. N.
(Oak Ridge Associated Universities, Inc. TN, United States)
Adams, J. S.
(Maryland Univ. Baltimore County Baltimore, MD, United States)
Bandler, S. R.
(Maryland Univ. College Park, MD, United States)
Brekosky, R. P.
(Muniz Engineering, Inc.)
Chevenak, J. A.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Eckart, M. E.
(Maryland Univ. Baltimore County Baltimore, MD, United States)
Finkbeiner, F. M.
(Wyle Information Systems Greenbelt, MD, United States)
Kelley, R. L.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Kally, D. P.
(Muniz Engineering, Inc. Seabrook, MD)
Kilbourne, C. A.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Porter, F. S.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Sadleir, J. E.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Smith, S. J.
(Maryland Univ. Baltimore County Baltimore, MD, United States)
Date Acquired
August 26, 2013
Publication Date
February 10, 2012
Publication Information
Publication: Journal of Low Temperature Physics
Volume: 167
Issue: 4-Mar
Subject Category
Instrumentation And Photography
Report/Patent Number
GSFC.JA.7030.2012
Distribution Limits
Public
Copyright
Other

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