Progress towards a double flux-locked-loop scheme for SQuID readout of TES detector arrays

Guido Torrioli; Simona Lombardo; Claudio Macculi; Luigi Piro; Luca Colasanti

doi:10.1117/12.2056317

24 July 2014 Progress towards a double flux-locked-loop scheme for SQuID readout of TES detector arrays

Guido Torrioli, Simona Lombardo, Claudio Macculi, Luigi Piro, Luca Colasanti

Proceedings Volume 9144, Space Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray; 91443V (2014) https://doi.org/10.1117/12.2056317
Event: SPIE Astronomical Telescopes + Instrumentation, 2014, Montréal, Quebec, Canada

Abstract

Frequency Division Multiplexing technique for reading TES detectors with SQuID devices, requires high loop-gain up to MHz frequency range in the SQuID feedback loop. Such a requirement is difficult to achieve when the feedback loop has a physical length that makes the propagation times of signals not negligible, as in the case in which the readout electronics is placed at room temperature. A novel SQuID readout scheme, called Double Loop-Flux Locked loop (DLFLL), has been proposed earlier. According to this scheme it is possible to make use of a simplified cryogenic electronics, AC coupled, featuring low power dissipation, in order to obtain a cryogenic feedback loop that results in reduced propagation times of signals. The DC and low frequency signals are managed by a standard FLL electronics working at room temperature. Here we present the progress of the integrated Double Loop system.

Citation Download Citation

Guido Torrioli, Simona Lombardo, Claudio Macculi, Luigi Piro, and Luca Colasanti "Progress towards a double flux-locked-loop scheme for SQuID readout of TES detector arrays", Proc. SPIE 9144, Space Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray, 91443V (24 July 2014); https://doi.org/10.1117/12.2056317

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