Study of laser-driven magnetic fields with a continuous wave Faraday rotation diagnostic

Ivanov, V. V.; Maximov, A. V.; Astanovitskiy, A. L.; Begishev, I. A.; Betti, R.; Davies, J. R.; Mileham, C.; Moody, J. D.; Stoeckl, C.; Swanson, K. J.; Wong, N. L.; Bromage, J.

doi:10.1063/1.5141753

DOE OSTI · 1602872

Study of laser-driven magnetic fields with a continuous wave Faraday rotation diagnostic

Ivanov, V. V.·Maximov, A. V.·Astanovitskiy, A. L.·Begishev, I. A.·Betti, R.·Davies, J. R.·Mileham, C.·Moody, J. D.·Stoeckl, C.·Swanson, K. J.·Wong, N. L.·Bromage, J.

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Abstract

Magnetic fields driven by a laser in coil targets were studied for laser energies of ~25 J and two pulse durations of 2.8 ns and 70 ps. Axial magnetic fields in the coils were measured by continuous wave Faraday rotation diagnostics. The diagnostics indicated magnetic fields of 6–14 T in the coil and currents of 10–20 kA. Magnetic fields were compared for similar laser targets, focusing conditions, and laser energies. A 30-times increase in the intensity of the laser beam by reducing the pulse duration resulted in an increase in the magnetic field and current by a factor of 2. The relaxation time of the magnetic pulse was on the sub-microsecond scale.

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Ivanov, V. V., Maximov, A. V., Astanovitskiy, A. L., Begishev, I. A., Betti, R., Davies, J. R., Mileham, C., Moody, J. D., Stoeckl, C., Swanson, K. J., Wong, N. L., Bromage, J.. 2020-03-03. Study of laser-driven magnetic fields with a continuous wave Faraday rotation diagnostic. https://doi.org/10.1063/1.5141753

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