Development of TES-based x-ray microcalorimeters for HUBS

Y. R. Wang; S. F. Wang; F. J. Li; Y. J. Liang; J. Ding; Y. L. Chen; W. Cui; R. Huang; X. Y. Hua; H. Jin; G. L. Wang; S. Zhang; Y. N. Zhang; Y. Zhou

doi:10.1117/12.2560046

13 December 2020 Development of TES-based x-ray microcalorimeters for HUBS

Y. R. Wang, S. F. Wang, F. J. Li, Y. J. Liang, J. Ding, Y. L. Chen, W. Cui, R. Huang, X. Y. Hua, H. Jin, G. L. Wang, S. Zhang, Y. N. Zhang, Y. Zhou

Author Affiliations +

Proceedings Volume 11444, Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray; 114449C (2020) https://doi.org/10.1117/12.2560046
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Conference Poster

Abstract

Hot Universe Baryon Surveyor (HUBS)¹ is being conceptualized in China as a high throughput and highresolution spectroscopic X-ray mission dedicated to studying cosmic “missing” baryons, which are thought to exist in the gas of very low density and temperature of roughly one million degrees in the halo of galaxies or in large-scale structures. To detect weak emission from the “missing” baryons, HUBS will employ an X-ray microcalorimeter based on transition-edge sensors (TES) array that operates at very low temperatures. The key characteristics of the detector technology are excellent energy resolution and high quantum efficiency, which makes it an ideal choice for constructing a non-dispersive X-ray imaging spectrometer. We are developing X-ray microcalorimeters for HUBS, based on superconducting Mo/Cu bilayer films. In this work, we present results on characterization of the Mo/Cu films and TES devices at temperatures below 200 mK, including their I − V characteristics, pulse signals and energy resolutions. We have also studied correlations between the superconductivity and other properties of the films (including residual resistivity ratio, stress, crystalline structure, interface properties, etc.). Preliminary results are presented in this work.

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Y. R. Wang, S. F. Wang, F. J. Li, Y. J. Liang, J. Ding, Y. L. Chen, W. Cui, R. Huang, X. Y. Hua, H. Jin, G. L. Wang, S. Zhang, Y. N. Zhang, and Y. Zhou "Development of TES-based x-ray microcalorimeters for HUBS", Proc. SPIE 11444, Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray, 114449C (13 December 2020); https://doi.org/10.1117/12.2560046

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