The performance of the ATHENA X-ray Integral Field Unit
Abstract
The X-ray Integral Field Unit (X-IFU) is a next generation microcalorimeter planned for launch onboard the Athena observatory. Operating a matrix of 3840 superconducting Transition Edge Sensors at 90 mK, it will provide unprecedented spectro-imaging capabilities (2.5 eV resolution, for a field of view of 5') in the soft X-ray band (0.2 up to 12 keV), enabling breakthrough science. The definition of the instrument evolved along the phase A study and we present here an overview of its predicted performances and their modeling, illustrating how the design of the X-IFU meets its top-level scientific requirements. This article notably covers the energy resolution, count-rate capability, quantum efficiency and non X-ray background levels, highlighting their main drivers.
- Publication:
-
Space Telescopes and Instrumentation 2018: Ultraviolet to Gamma Ray
- Pub Date:
- July 2018
- DOI:
- 10.1117/12.2313720
- Bibcode:
- 2018SPIE10699E..4KP