Extended Line Spread Function of TES Microcalorimeters with Au/Bi Absorbers
In: IEEE Transactions on Applied Superconductivity, Jg. 29 (2019-03-06), Heft 5
Online
report
Microcalorimeters have the potential to provide line shapes well-described by a single Gaussian broadening term of few-eV width. This attribute makes the detectors especially well suited for x-ray astrophysics observations; however, low-level non-Gaussian broadening terms are expected and must be characterized. These terms depend on the composition of the x-ray absorber, the detailed x-ray absorption physics, the device thermalization processes, and the incident x-ray energy. Here we present the first measurements targeted at understanding the extended line-spread function (LSF) of x-ray microcalorimeter pixels under development for the X-ray Integral Field Unit (XIFU) on the Athena X-ray Observatory. These pixels are comprised of Mo/Au transition-edge sensors (TESs) with overhanging electroplated Au/Bi absorbers. We measured the line shapes using monochromatic x-ray sources with < 1 eV width at several x-ray energies (0.85, 0.93, 1.25, 1.5, 5.4, and 8.0 keV) across the instrument bandpass (0.3-12 keV) and modeled the line profiles. These results are compared to the extended LSF of the Hitomi microcalorimeter pixels that used HgTe absorbers.
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Extended Line Spread Function of TES Microcalorimeters with Au/Bi Absorbers
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Autor/in / Beteiligte Person: | Eckart, M. E. ; Adams, J. S. ; Bandler, S. R. ; Beaumont, S. ; Chervenak, J. A. ; Datesman, A. M. ; Finkbeiner, F. M. ; Hummatov, R. ; Kelley, R. L. ; Kilbourne, C. A. ; Leutenegger, M. A. ; Miniussi, A. R. ; Moseley, S. J. ; F. S Porter ; Sadleir, J. E. ; Sakai, K. ; Smith, S. J. ; Wakeham, N. ; Wassell, E. J. |
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Zeitschrift: | IEEE Transactions on Applied Superconductivity, Jg. 29 (2019-03-06), Heft 5 |
Veröffentlichung: | United States: NASA Center for Aerospace Information (CASI), 2019 |
Medientyp: | report |
ISSN: | 1558-2515 (print) ; 1051-8223 (print) |
DOI: | 10.1109/TASC.2019.2903420 |
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