|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'500'096
Articles rated: 2609
19 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
Characterising the optical response of ultra-low-noise far-infrared 60-110 $μ$m transition edge sensors | | Emily A. Williams
; Stafford Withington
; David J. Goldie
; Christopher N. Thomas
; Peter A. R. Ade
; Rashmi Sudiwala
; | | Date: |
19 Aug 2020 | | Abstract: | Far-infrared Transition Edge Sensors (TESs) are being developed for the
SAFARI grating spectrometer on the cooled-aperture space telescope SPICA. In
support of this work, we have devised a cryogenic (90 mK) test facility for
carrying out precision optical measurements on ultra-low-noise TESs. Although
our facility is suitable for the whole of the SAFARI wavelength range, 34-230
$mu$m, we focus on a representative set of measurements at 60-110 $mu$m using
a device having a Noise Equivalent Power (NEP) of 0.32 $mathrm{aW/sqrt{Hz}}$.
The system is able to perform a range of measurements: (i) Dark electrical
characterisation. (ii) Optical efficiency with respect to a partially coherent
beam having a modal composition identical to that of an ideal imaging
telescope. (iii) Optical saturation and dynamic range. (iv) Fast optical
transient response to a modulated thermal source. (v) Optical transient
response in the presence of high-level background loading. We describe dark
measurements to determine the operating characteristics of a TES, and then
compare predicted optical behaviour with measured optical behaviour. By
comparing electrical and optical transient response, we were able to observe
thermalisation in the device. We comment on the challenge of eliminating stray
light. | | Source: | arXiv, 2008.08475 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser claudebot
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER