Low-noise readout of superconducting bolometers based on electrothermal feedback
| Autor: | Panu Helistö, Jari Penttilä, Hannu Sipola, Heikki Seppä |
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| Jazyk: | angličtina |
| Rok vydání: | 2006 |
| Předmět: |
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 |
| Zdroj: | 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 |
| ISSN: | 1361-6668 0953-2048 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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