Benson, Chris S., Scott, Jeremy P., Spencer, Locke D., Sudiwala, Rashmikant  ORCID: https://orcid.org/0000-0003-3240-5304, Cox, James, Jones, Tyrone, Ricketti, Berke V. and Wood, Ken
2024.
Characterisation of a PID feedback-controlled array of TES-bolometers in a far-infrared double-Fourier interferometry testbed.
Presented at: SPIE Astronomical Telescopes + Instrumentation 2024,
Yokohama, Japan,
16-21 June 2024.
Published in: Zmuidzinas, Jonas and Gao, Jian-Rong eds.
Proc. SPIE Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XII.
, vol.13102
Washington, USA:
SPIE,
10.1117/12.3019289
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Abstract
Double-Fourier interferometry (DFI) from a space-based platform provides a path to achieve broadband imaging spectroscopy in the far-infrared with sub-arcsecond angular resolution. To provide further study of the technique and improve its technology readiness, we have constructed a laboratory-based DFI testbed. This instrument is coupled to a custom array of 25 feedback-controlled transition-edge sensor (TES) bolometers. We present the results of characterisation experiments to optimise the detector system for laboratory-based experiments involving the DFI testbed. We demonstrate that tuning the proportional-integral-derivative (PID) feedback control loops of the detectors and the timing of the multiplexed measurement process can modify the detector array's noise performance and speed of response to optical modulation for this purpose. From these, we have determined a set of optimised detector settings that reduce spectral noise in the spatial-spectral interferometer by 37-75%. In addition, we present further thermal characterisation of the detector array.
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Date Type: | Publication |
| Status: | Published |
| Schools: | Schools > Physics and Astronomy |
| Subjects: | Q Science > QB Astronomy Q Science > QC Physics |
| Publisher: | SPIE |
| ISBN: | 9781510675278 |
| Date of First Compliant Deposit: | 28 February 2025 |
| Last Modified: | 07 Apr 2025 01:45 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/176538 |
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