Ultra-short time local current density distribution in superconducting strips: A new experimental approach
We have studied the local current distribution in thin superconducting strips in the presence of a transverse magnetic field, at very short times (approximately 10 μs) after the establishment of the critical state. We used a non-conventional technique that combines the use of a pulsed magnetic field...
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1999
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09532048_v12_n4_p210_Ferrari http://hdl.handle.net/20.500.12110/paper_09532048_v12_n4_p210_Ferrari |
| Aporte de: |
| Sumario: | We have studied the local current distribution in thin superconducting strips in the presence of a transverse magnetic field, at very short times (approximately 10 μs) after the establishment of the critical state. We used a non-conventional technique that combines the use of a pulsed magnetic field and a synchronized pulsed laser. The high energy laser spot was directed to irradiate different regions of the sample at controlled delays after the rising/falling edge of the magnetic field. The time integrated photovoltaic pulse (approximately 10 ns) related to flux redistribution was studied and a model is proposed that describes the measured signal in terms of the local critical current distribution present in the sample at the time of laser irradiation. |
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