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Author Гольцман, Г. Н.; Разумовская, И. В.; Окунев, О. В; Чулкова, Г. М.; Корнеев, А. А.; Финкель, М. И.; Масленников, С. Н.; Семенов, А. В.; Александров, В. Н.
Title Сборник программ учебных дисциплин профессионального цикла подготовки магистров и бакалавров по направлению «Физика» Type Journal Article
Year 2011 Publication Прометей Abbreviated Journal Прометей
Volume Issue Pages 67
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Notes (down) Учебное пособие Approved no
Call Number RPLAB @ gujma @ Serial 717
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Author Bulaevskii, L. N.; Graf, M. J.; Batista, C. D.; Kogan, V. G.
Title Vortex-induced dissipation in narrow current-biased thin-film superconducting strips Type Journal Article
Year 2011 Publication Phys. Rev. B Abbreviated Journal Phys. Rev. B
Volume 83 Issue 14 Pages 9
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Abstract A vortex crossing a thin-film superconducting strip from one edge to the other, perpendicular to the bias current, is the dominant mechanism of dissipation for films of thickness d on the order of the coherence length ξ and of width w much narrower than the Pearl length Λâ‰<ab>wâ‰<ab>ξ. At high bias currents I*<I<Ic the heat released by the crossing of a single vortex suffices to create a belt-like normal-state region across the strip, resulting in a detectable voltage pulse. Here Ic is the critical current at which the energy barrier vanishes for a single vortex crossing. The belt forms along the vortex path and causes a transition of the entire strip into the normal state. We estimate I* to be roughly Ic/3. Furthermore, we argue that such “hot” vortex crossings are the origin of dark counts in photon detectors, which operate in the regime of metastable superconductivity at currents between I* and Ic. We estimate the rate of vortex crossings and compare it with recent experimental data for dark counts. For currents below I*, that is, in the stable superconducting but resistive regime, we estimate the amplitude and duration of voltage pulses induced by a single vortex crossing.
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Notes (down) SSPD Approved no
Call Number RPLAB @ gujma @ Serial 688
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Author Ryabchun, S.; Smirnov, A.; Pentin, I.; Vakhtomin, Yu.; Smirnov, K.; Kaurova, N.; Voronov, B.; Goltsman, G.
Title Superconducting single photon detector integrated with optical cavity Type Conference Article
Year 2011 Publication Proc. MLPLIT Abbreviated Journal Proc. MLPLIT
Volume Issue Pages 143-145
Keywords NbN SSPD, cavity
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Address Suzdal / Vladimir (Russia)
Corporate Author Thesis
Publisher Modern laser physics and laser-information technologies for science and manufacture Place of Publication Editor
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Area Expedition Conference 1st international russian-chinese conference / youthschool-workshop
Notes (down) September 23-28, 2011 Approved no
Call Number Serial 1385
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Author Maslennikova, A.; Larionov, P.; Ryabchun, S.; Smirnov, A.; Pentin, I.; Vakhtomin, Yu.; Smirnov, K.; Kaurova, N.; Voronov, B.; Goltsman, G.
Title Noise equivalent power and dynamic range of NBN hot-electron bolometers Type Conference Article
Year 2011 Publication Proc. MLPLIT Abbreviated Journal Proc. MLPLIT
Volume Issue Pages 146-148
Keywords NbN HEB
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Address Suzdal / Vladimir (Russia)
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Publisher Modern laser physics and laser-information technologies for science and manufacture Place of Publication Editor
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Area Expedition Conference 1st international russian-chinese conference / youthschool-workshop
Notes (down) September 23-28, 2011 Approved no
Call Number Serial 1386
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Author Galeazzi, Massimiliano
Title Fundamental noise processes in TES devices Type Journal Article
Year 2011 Publication IEEE Trans. Appl. Supercond. Abbreviated Journal IEEE Trans. Appl. Supercond.
Volume 21 Issue 3 Pages 267-271
Keywords TES, Johnson noise, phonon noise, excess noise, flux-flow noise, thermal fluctuation noise
Abstract Microcalorimeters and bolometers are noise-limited devices, therefore, a proper understanding of all noise sources is essential to predict and interpret their performance. In this paper, I review the fundamental noise processes contributing to Transition Edge Sensor (TES) microcalorimeters and bolometers and their effect on device performance. In particular, I will start with a simple, monolithic device model, moving to a more complex one involving discrete components, to finally move to today's more realistic, comprehensive model. In addition to the basic noise contribution (equilibrium Johnson noise and phonon noise), TES are significantly affected by extra noise, which is commonly referred to as excess noise. Different fundamental processes have been proposed and investigated to explain the origin of this excess noise, in particular near equilibrium non-linear Johnson noise, flux-flow noise, and internal thermal fluctuation noise. Experimental evidence shows that all three processes are real and contribute, at different levels, to the TES noise, although different processes become important at different regimes. It is therefore time to discard the term “excess noise” and consider these terms part of the “fundamental noise processes” instead.
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Notes (down) Recommended by Klapwijk Approved no
Call Number Serial 914
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