Characterisation of a PID feedback-controlled array of TES-bolometers in a far-infrared double-Fourier interferometry testbed.

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 Item availability restricted.

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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 Mar 2025 12:15
URI:	https://orca.cardiff.ac.uk/id/eprint/176538

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