Abstract
The Cryogenic AntiCoincidence detector (CryoAC) of ATHENA X-IFU is designed to reduce the particle background of the instrument and to enable the mission science goals. It is a 4-pixel silicon microcalorimeter sensed by an Ir/Au TES network. We have developed the CryoAC demonstration model, a prototype aimed to probe the critical technologies of the detector, i.e., the suspended absorber with an active area of 1 cm2; the low energy threshold of 20 keV; and the operation connected to a 50 mK thermal bath with a power dissipation less than 40 nW. Here, we report the test performed on the first CryoAC DM sample (namely, the AC-S10 prototype), showing that it is fully compliant with its requirements.
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Acknowledgements
This work has been supported by ASI contract n. 2018-11-HH.0 and ESA CTP contracts n. 4000116655/16/NL/BW and n. 4000114932/15/NL/BW. The authors would like to acknowledge the SRON X-IFU FPA team for the support in the development of the CryoAC DM setup, and Giorgio Amico (Sapienza University of Rome) for the production of CryoAC DM brackets.
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D’Andrea, M., Macculi, C., Torrioli, G. et al. The Demonstration Model of the ATHENA X-IFU Cryogenic AntiCoincidence Detector. J Low Temp Phys 199, 65–72 (2020). https://doi.org/10.1007/s10909-019-02300-9
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DOI: https://doi.org/10.1007/s10909-019-02300-9