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Low-noise readout of superconducting bolometers based on electrothermal feedback
- Source :
- Penttilä, J S, Sipola, H, Helistö, P & Seppä, H 2006, ' Low-noise readout of superconducting bolometers based on electrothermal feedback ', Superconductor Science and Technology, vol. 19, no. 4, pp. 319-322 . https://doi.org/10.1088/0953-2048/19/4/013
- Publication Year :
- 2006
- Publisher :
- Institute of Physics IOP, 2006.
-
Abstract
- We have developed a simple room-temperature readout for superconducting bolometers and calorimeters. Due to electro-thermal feedback, the bolometer can be noise-matched with the readout amplifier. The constructed amplifier consists of low-noise field-effect transistors, and voltage bias is actively provided by electrical feedback. According to our measurements on superconducting vacuum-bridge bolometers, the total noise is limited by the bolometer phonon and Johnson noise characterized by a critical temperature of 8.5 K. We show that, with proper sensor design, it is possible to reach the photon noise limit in video-rate submillimetre imaging applications.
- Subjects :
- Y-factor
Astrophysics::Cosmology and Extragalactic Astrophysics
Noise (electronics)
law.invention
law
Materials Chemistry
superconducting calorimeters
Electrical and Electronic Engineering
Astrophysics::Galaxy Astrophysics
Physics
Superconductivity
business.industry
Amplifier
Transistor
Bolometer
Metals and Alloys
Astrophysics::Instrumentation and Methods for Astrophysics
Johnson–Nyquist noise
Condensed Matter Physics
Ceramics and Composites
Optoelectronics
business
superconducting bolometers
bolometers
Voltage
Subjects
Details
- Language :
- English
- ISSN :
- 13616668 and 09532048
- Volume :
- 19
- Issue :
- 4
- Database :
- OpenAIRE
- Journal :
- Superconductor Science and Technology
- Accession number :
- edsair.doi.dedup.....46c772efb07370cadcda9579a828924b
- Full Text :
- https://doi.org/10.1088/0953-2048/19/4/013