18th International Workshop on Low Temperature Detectors (LTD-18)

22-26 July 2019
Milano
Europe/Rome timezone

Properties of the SQUID readout chain under development for the ATHENA X-IFU instrument

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

Speaker

Jan van der Kuur (Netherlands Institute for Space Research)

Description

Superconducting Quantum Interference Devices (SQUIDs) are used as the standard first-stage amplifier for the readout of cryogenic TES-based detector arrays, and multiplexing techniques are used to minimise the heat loads and complexity of TES readout systems. Frequency domain multiplexing is the baseline for the readout of an imaging array of TES-based microcalorimeters the X-IFU instrument on the future ESA Athena X-ray telescope.
SQUID properties such as flux noise and bandwidth are crucial for the performance of the readout system for the X-IFU. In this paper we present the measured properties of the two-stage SQUID system which has been developed for the readout of the X-IFU detector array. One of the crucial results is the observation of a flux noise level of $0.2 \mu \Phi_0/\sqrt{\mathrm{Hz}}$ over a flux range of approximately $0.3$\Phi_0\$. Besides that, properties such as the backaction noise, dynamic resistance, and power dissipation will be discussed, as well as the direction for further optimisation.

Less than 5 years of experience since completion of Ph.D N N

Primary authors

Jan van der Kuur (Netherlands Institute for Space Research) Mr Mikko Kiviranta (VTT) Luciano Gottardi (SRON - Netherlands Institute for Space Research) Hiroki Akamatsu (Netherlands Institute for Space Research) Dr Marcel Bruijn (SRON - Netherlands Institute for Space Research) Mr Kevin Ravensberg (SRON Netherlands Institute for Space Research) Damian Audley (SRON) Brian Jackson (Netherlands Institute for Space Research)