The Demonstration Model of the ATHENA X-IFU Cryogenic AntiCoincidence Detector

• DOI: 10.1007/s10909-019-02300-9
• Publication Date: 2019-12-20T13:02:53Z
• Authors: M. D’Andrea; C. Macculi; G. Torrioli; A. Argan; D. Brienza; S. Lotti; G. Minervini; L. Piro; M. Biasotti; L. Ferrari Barusso; F. Gatti; M. Rigano; A. Volpe; E. S. Battistelli
• Keywords: Cryogenic temperature; Cryogenics

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.<br/>Accepted for publication in the Journal of Low Temperature Physics for LTD-18 special issue<br/>