The phonon mediated TES cosmic ray detector for focal plane of ATHENA x-ray Telescope

23 Jul 2019, 17:45
1h 15m
Piazza Città di Lombardia (Milano)

Piazza Città di Lombardia

Milano

Piazza Città di Lombardia, 1, 20124 Milano MI
Poster Detector readout, signal processing, and related technologies Poster session

Speaker

Michele Biasotti (GE)

Description

The next generation of micro-calorimeter arrays for X-Ray Space Telescopes will expose thousands TESs and their absorbers to cosmic particles. An anticoincidence detector is necessary, because cosmic rays mimic the expected physical signals of x-rays from astrophysical sources. This anticoincidence detector must be operated at 50mK, the same environment of the X-ray micro-calorimeter array by GSFC-NASA. I will outline its design and the physics of the signal generation by means of a simulation of phonon dynamic. This work has been done into the framework of the anticoincidence development for the X-IFU instrument inside ATHENA mission project. The detector structure is based on micro-machined silicon chip whose absorber is supported by small silicon beams. Energetic charged particles have been simulated to deposit their energy in a small hot spot. In order to maximize the detection efficiency of the emerging quasi-diffusive phonon burst, we have uniformly distributed 96 TESs on one silicon side. Each has 50 × 250 μm2 area and 200-nm-thick IrAu bilayer. They are parallel connected to a single SQUID readout channel. Fabrication and performance tests will be also presented.

Less than 5 years of experience since completion of Ph.D N
Student (Ph.D., M.Sc. or B.Sc.) N

Primary authors

Michele Biasotti (GE) Prof. Corrado Boragno (Universty of Genoa) Dr Lorenzo Ferrari Barusso (Genova University) Flavio Gatti (GE)

Co-authors

Daniele Grosso (Università di Genova, Dipartimento di Fisica) Beatrice Siri (GE) Matteo D'Andrea (INAF/IAPS) Claudio Macculi (INAF) Luigi Piro (IAPS/INAF)

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