Electronic noise of superconducting tunnel junction detectors
| Autor: | Franz von Feilitzsch, M. Gutsche, J. Jochum, R. L. Mössbauer, B. Kemmather, H. Kraus |
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| Rok vydání: | 1994 |
| Předmět: |
Physics
Nuclear and High Energy Physics Noise temperature Noise spectral density Shot noise Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Noise (electronics) Computational physics Burst noise Tunnel junction Condensed Matter::Superconductivity Superconducting tunnel junction Flicker noise Instrumentation |
| Zdroj: | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 338:458-466 |
| ISSN: | 0168-9002 |
| Popis: | The optimal signal to noise ratio for detectors based on superconducting tunnel junctions is calculated and compared for the cases of a detector consisting of one single tunnel junction, as well as of series and of parallel connections of such tunnel junctions. The influence of 1/ƒ noise and its dependence on the dynamical resistance of tunnel junctions is discussed quantitatively. A single tunnel junction yields the minimum equivalent noise charge. Such a tunnel junction exhibits the best signal to noise ratio if the signal charge is independent of detector size. In case, signal charge increases with detector size, a parallel or a series connection of tunnel junctions would provide the optimum signal to noise ratio. The equivalent noise charge and the respective signal to noise ratio are deduced as functions of tunnel junction parameters such as tunneling time, quasiparticle lifetime, etc. |
| Databáze: | OpenAIRE |
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