The TES-based Cryogenic AntiCoincidence Detector of ATHENA X-IFU: Validation of the thermal end-to-end simulator towards the updated Demonstration Model (DM 1.1)

• DOI: 10.48550/arxiv.2501.12781
• Publication Date: 2025-08-01
• Authors: Matteo D'Andrea; Claudio Macculi; Simone Lotti; Luigi Piro; Andrea Argan; Gabriele Minervini; Guido Torrioli; Fabio Chiarello; Lorenzo Ferrari B...; Edvige Celasco; Flavio Gatti; Daniele Grosso; Manuela Rigano; Daniele Brienza; Elisabetta Cavazzuti; Angela Volpe
• Keywords: FOS: Physical sciences; Astrophysics - Instrumentation and Methods for Astrophysics; Instrumentation and Methods for Astrophysics (astro-ph.IM)

The Cryogenic AntiCoincidence Detector (CryoAC) is a key element of the X-ray Integral Field Unit (X-IFU) on board the future ATHENA X-ray observatory. It is a TES-based detector designed to reduce the particle background of the instrument, thereby increasing its sensitivity. The detector design is driven by an end-to-end simulator which includes the electro-thermal modelling of the detector and the dynamics of its readout chain. Here, we present the measurements carried out on the last CryoAC single pixel prototype, namely DM127, in order to evaluate the critical thermal parameters of the detector and consequently to tune and validate the CryoAC end-to-end simulator.<br/>Accepted for publication in IEEE Transactions on Applied Superconductivity for ASC2024 special issue<br/>