Extension of the Energy Range Accessible with a TES Using Bath Temperature Variations
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Date
2020-02-24
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Citation of Original Publication
Beaumont, S., Adams, J.S., Bandler, S.R. et al. Extension of the Energy Range Accessible with a TES Using Bath Temperature Variations. J Low Temp Phys 199, 704–715 (2020). https://doi.org/10.1007/s10909-020-02400-x
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This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
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Abstract
The energy range of transition-edge sensor (TES) X-ray microcalorimeters with a
multiplexed readout depends upon the width and shape of the TES superconducting
transition, and also on the dynamic range of the readout. In many detector systems,
the multiplexed readout slew rate capability will be the limiting factor for the energy
range. In these cases, if we are willing to accept some energy resolution degrada tion, we can signifcantly extend the energy range by increasing the bath temperature
of operation, essentially creating a second “extended energy range” mode of opera tion. For example, if we require the very highest energy resolution up to 7 keV, and
wish to optimize the design up to this energy, for some measurements it could be
very benefcial to have a mode where we can extend the energy range to 15–20 keV
even if some energy resolution is sacrifced. In this paper, we explore the trade-of
between dynamic range and energy resolution from changing the bath temperature
of the TES. We present measurements of TES resolution and slew rate as a function
of bath temperature and compare to numerical simulations.