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Large Area Transition Edge Sensor X-ray Microcalorimeters for Diffuse X-ray Background Studies

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Abstract

We are developing transition edge sensor (TES) mirocalorimeters with large area (0.72 mm\(^2\)) absorbers to study the keV diffuse X-ray background. The goal is to develop a 2 cm\(^2\) array of 256 pixels for a sounding rocket payload. We present a pixel design which includes a Mo/Au bilayer TES coupled to a large (850 x 850 x 0.2 \(\upmu \)m\(^3\)) gold absorber. Our simulations indicate that such a design can achieve energy resolution as good as 1.6 eV FWHM in our target bandpass of 0.05–1 keV. Additionally, thermal modelling shows that for typical gold layers, the position-dependent variation of the pulse shape over the large area of the absorber is not expected to significantly degrade this energy resolution. An array of devices will be fabricated in late 2013 to test this design.

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Acknowledgments

This work was supported by a NASA Office of the Chief Technologist’s Space Technology Research Fellowship. Supported in part by NASA grant NNX09AF09G. This research was in part supported by appointment (S.E. Busch) to the NASA Postdoctoral Program at Goddard Space Flight Center, administered by Oak Ridge Associated Universities through a contract with NASA.

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Authors and Affiliations

  1. Department of Physics, University of Wisconsin-Madison, Madison, WI, 53706, USA

    K. M. Morgan & D. McCammon

  2. X-ray Astrophysics Lab, NASA Goddard Space Flight Center, Greenbelt, MD, 20771, USA

    S. E. Busch, M. E. Eckart & C. A. Kilbourne

  3. NASA Postdoctoral Program at Goddard Space Flight Center, Greenbelt, MD, 20771, USA

    S. E. Busch

  4. CRESST and University of Maryland, Baltimore County, MD, 21250, USA

    M. E. Eckart

Authors
  1. K. M. Morgan
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  2. S. E. Busch
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  3. M. E. Eckart
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  4. C. A. Kilbourne
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  5. D. McCammon
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Correspondence to K. M. Morgan.

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Morgan, K.M., Busch, S.E., Eckart, M.E. et al. Large Area Transition Edge Sensor X-ray Microcalorimeters for Diffuse X-ray Background Studies. J Low Temp Phys 176, 331–336 (2014). https://doi.org/10.1007/s10909-013-1011-6

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  • DOI: https://doi.org/10.1007/s10909-013-1011-6

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