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.
| Original language | English |
|---|---|
| Pages (from-to) | 319-322 |
| Number of pages | 4 |
| Journal | Superconductor Science and Technology |
| Volume | 19 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2006 |
| MoE publication type | A1 Journal article-refereed |
Keywords
- superconducting bolometers
- superconducting calorimeters
- bolometers
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