The demonstration model of the ATHENA X-IFU cryogenic AntiCoincidence detector
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D’Andrea M., Macculi C., Torrioli G., Argan A., Brienza D., Lotti S., Minervini G., Piro L., Biasotti M., Ferrari Barusso L., Gatti F., Rigano M., Volpe A., Battistelli E. S.
ISSN: 1573-7357
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.