Simulation of the Heat Transfer Process of Superconducting Films in the Resistive State

Vasyutin, M. A.; Kuz’michev, N. D.; Shilkin, D. A.

doi:10.1134/s1063784221030233

Cited by 4 publications

(2 citation statements)

References 7 publications

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“…It was shown in the papers [16][17][18][19] that at milliseconds current actions there is a strong influence of liquid nitrogen boiling modes, dynamic heating processes and hot spot formation on the measurement results, which, in turn, significantly complicates the processing and interpretation of experimental data, as well as simulation of such systems. Shorter current pulse times are required to study fast physical processes not related to the heat spot propagation [20].…”

Section: Introductionmentioning

confidence: 99%

Controlled commutation modes in a switch based on HTS composites

Martirosian,

Malyavina,

Pokrovskii

et al. 2024

Phys. Scr.

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This paper presents the results of experimental studies of switching processes of high-temperature superconducting tapes under the action of a pulse current load of microsecond duration. The re-versible, stable and irreversible switching of the superconductor to the normal state has been real-ized. To demonstrate the opportunity of controlled generation of transients in superconducting composites, the characteristics of a superconducting switch capable of cyclic switching between flux flow and ohmic modes with preservation of switching parameters were investigated. The characteristics of a superconducting switch have been calculated based on experimental results.

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Section: Introductionmentioning

confidence: 99%

Controlled commutation modes in a switch based on HTS composites

Martirosian,

Malyavina,

Pokrovskii

et al. 2024

Phys. Scr.

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“…In the case of films 400−600 nm thick, the temperature of transition to the superconducting state is T c = 16.2−16.5 K, and the transition width is T c ≈ 0.1 K. The film samples were l = 9 mm long and b = 5 mm wide. The electrical characteristics were studied by using the four−contact method; the contacts were made from beryllium bronze ensuring extra heat removal from the samples [9]. To form a single pulse and detect responses from the potential contacts and reference resistance connected in series (R = 1 ), generator ASK-4106 and oscilloscope ASK-3107 with the transmission frequency bands no less than 100 MHz were used (Fig.…”

mentioning

confidence: 99%

Experimental method for controlling the overheating of superconducting films under the action of a pulsed current

Vasyutin

Kuz’michev

D.A.

2022

Technical Physics Letters

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Using time sweeps of the current through a sample of a superconducting film, the effect of the current sweep rate on the process of heat propagation from current contacts is investigated. The samples used were NbN films with temperatures below and above the temperature of transition to the superconducting state. A method for determining the critical heating of key zones of the sample is proposed. The propagation velocities of the resistive front and normal domain in a superconductor are estimated at different temperatures. Keywords: niobium nitride films, time sweep of the current, resistive front, normal domain.

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