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