Noise, spectral, and optical characterisation of far-infrared transition-edge sensor bolometers with frequency-domain multiplexing read-out.

Huijser, Glenn Folkert (2022) Noise, spectral, and optical characterisation of far-infrared transition-edge sensor bolometers with frequency-domain multiplexing read-out. Master's Thesis / Essay, Astronomy.

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Abstract

In this work the noise, spectral, and optical properties of an early prototype TES array (originally fabricated for the SPICA mission) are studied in the far-infrared (30 – 300 um) regime with a novel and flexible cryostat-housed optical test-bed configuration at SRON. The set-up was further developed and improved during the course of the thesis. The signal read-out of the TES pixels is performed in a frequency-division multiplexing architecture with a single-stage SQUID with baseband feedback. The 8×8 prototype array is flawed; the pixel count was limited to 4 in this work. It is demonstrated that the read-out chain is capable of reading out the detector array; the pixel current noises are dominant for practically all operational working points. The spectral measurements demonstrate good sensitivity of the TES pixels in the 33 – 75 um range for ~fW optical loading. The details on the spectral responses require further studies. The background-limited performance of the array and the system is measured succesfully and studied, but consistent results could not be demonstrated between this work and interim published work [Audley, Huijser, de Lange & Orlando 2022]. Here, theoretical predictions of the photon noise based on single-mode EM wave propagation are presented and highlight possible systematic errors in the TES AC bias calibration: unwanted SQUID behaviour; cross-talk; on-chip wire-bonding issues; and unknown excess noise sources (see also den Hartog et al. 2014).

Item Type:	Thesis (Master's Thesis / Essay)
Supervisor name:	Lange, G. de
Degree programme:	Astronomy
Thesis type:	Master's Thesis / Essay
Language:	English
Date Deposited:	20 Dec 2022 14:28
Last Modified:	20 Dec 2022 14:28
URI:	https://fse.studenttheses.ub.rug.nl/id/eprint/29075

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