The characterisation of a PID feedback-controlled array of TES-bolometers in a double-Fourier interferometry testbed

Benson, Christopher S., Scott, Jeremy P., Spencer, Locke D., Sudiwala, Rashmi V. ORCID: https://orcid.org/0000-0003-3240-5304, Cox, James, Jones, Tyrone, Ricketti, Berke V., Naylor, David A., Wood, Ken, Ade, Peter ORCID: https://orcid.org/0000-0002-5127-0401, Zmuidzinas, Jonas and Gao, Jian-Rong 2024. The characterisation of a PID feedback-controlled array of TES-bolometers in a double-Fourier interferometry testbed. Presented at: SPIE Astronomical Telescopes + Instrumentation, Yokohama, Japan, 16-22 June 2024. Published in: Zmuidzinas, Jonas and Gao, Jian-Rong eds. Proceedings of SPIE 13102. 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 as an integrated component of the DFI assembly. 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 37–79%. In addition, we present further thermal characterisation of the detector array.

Item Type:	Conference or Workshop Item (Paper)
Status:	Published
Schools:	Physics and Astronomy
Publisher:	SPIE
ISBN:	9781510675278
ISSN:	0277-786X
Date of First Compliant Deposit:	29 October 2024
Date of Acceptance:	16 August 2024
Last Modified:	20 Nov 2024 14:30
URI:	https://orca.cardiff.ac.uk/id/eprint/173509

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