Direct Numerical Simulations for Non-equilibrium Superconducting Dynamics at the Transition Edge: Simulation for MgB2 Neutron Detectors

Machida, Masahiko; Kano, Takuma; Koyama, Tomio; Kato, Masaru; Ishida, Toshimasa

doi:10.1007/s10909-007-9613-5

Cited by 11 publications

(7 citation statements)

References 5 publications

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“…(22) and (23), we can draw up the function of total vortex-pair energy with the change of distance w where the coupling parameter is just c ¼ 0:1a 1 . If we vary the ratio between n m and d , we can find when l d > n m , the minimum of E p;IþII ðwÞ will happen at w m -0.…”

Section: Resultsmentioning

confidence: 99%

“…It is well known that the vortex structure is a favorable problem for the SCUTF of the conventional superconductors with only one s-wave gap [15] and has been made some thorough analysis [16][17][18]. Recently, some groups have fabricated the high-quality MgB 2 SCUTF and considered the possibility of its application on single-photon detectors [19][20][21][22], thus the understanding for the structure of vortices may help to investigate this application. Compared with bulk superconductor, the penetration depth of SCUTF is different with it and have the relation: k eff ¼ k 2 d where k comes from bulk form, which is attributed to stray field.…”

Section: Introductionmentioning

confidence: 99%

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Dipole magnetic flux in two-gap superconducting thin film in Ginzburg–Landau theory

Zhou

Gan

2015

Physica C: Superconductivity and its Applications

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dipole magnetic flux in two-gap superconducting thin film in Ginzburg–Landau theory

Zhou

Gan

2015

Physica C: Superconductivity and its Applications

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“…The energy dissipation caused by the vortex motion can lead to a local temperature rise [36][37][38], and even macroscopic thermomagnetic instabilities [39][40][41][42][43]. Thus, the relationship between the thermal effect and vortex motion has received significant attention [44][45][46][47]. The mechanism of dissipation in current-carrying superconducting thin films has been numerically studied by the TDGL equations and the heat diffusion equation [48,49].…”

Section: Introductionmentioning

confidence: 99%

Manipulation of vortex arrays with thermal gradients by applying dynamic heat sources

Chen

Yong

Zhou

2021

Supercond. Sci. Technol.

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In this paper, we investigate the manipulation of vortex arrays of magnetic flux by using dynamic heat sources in the superconducting strip. The time-dependent Ginzburg–Landau (TDGL) equations and the heat diffusion equation are numerically solved to study the effect of the dynamic heat sources and the vortex dynamics of the sample. Three distinct velocity ranges were shown to occur, depending on the vortex motion and the corresponding characteristics of the induced voltage. Due to the relationship among the driving force, viscous force, and vortex–vortex interaction, the vortex motion changes from direct motion to a roughly harmonic motion with the velocity of the heat source. Meanwhile, the electromagnetic performance of the sample is also related to the heat source parameters, the applied magnetic fields and the pinning centers. In addition, the thermal effect leads to a more complex non-linear relationship between the induced voltage and the heat source velocity.

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“…The energy dissipation in a restricted space causes a partial deterioration of local superconductivity in the MgB 2 thin film. The principle of the MgB 2 detector is thoroughly investigated by means of the Ginzburg-Landau equation, the Maxwell equation, and the heat conduction equation [17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Position Dependent Response of Superconducting MgB2 Neutron Detectors Studied by Pulsed Laser Irradiation

et al. 2012

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The MgB 2 detector consists of 200 nm thick MgB 2 thin film meander structure of 3 µm line width protected by 300 nm thick SiO layer. The electrical connections were provided by 150 nm thick Nb. The devices were placed in a 4 K refrigerator to investigate the behavior at temperatures below T c . The position-dependent response of the MgB 2 detector can be investigated by scanning a laser spot with the T. Ishida ( ) · I448 J Low Temp Phys (2012) 167:447-454 aid of the XY Z piezo-driven stage and an optical fiber with a focusing lens. We found that the inhomogeneity in a detector is very critical to specify the detection efficiency since the detector has the sensitivity only in a narrow temperature regime near T c .

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Direct Numerical Simulations for Non-equilibrium Superconducting Dynamics at the Transition Edge: Simulation for MgB2 Neutron Detectors

Cited by 11 publications

References 5 publications

Dipole magnetic flux in two-gap superconducting thin film in Ginzburg–Landau theory

Dipole magnetic flux in two-gap superconducting thin film in Ginzburg–Landau theory

Manipulation of vortex arrays with thermal gradients by applying dynamic heat sources

Position Dependent Response of Superconducting MgB2 Neutron Detectors Studied by Pulsed Laser Irradiation

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