Control of unsteady laser-produced plasma-flow with a multiple-coil magnetic nozzle

Taichi Morita, Masafumi Edamoto, Satoshi Miura, Atsushi Sunahara, Naoya Saito, Yutaro Itadani, Tomihiko Kojima, Yoshitaka Mori, Tomoyuki Johzaki, Yoshihiro Kajimura, Shinsuke Fujioka, Akifumi Yogo, Hiroaki Nishimura, Hideki Nakashima, Naoji Yamamoto

Research output: Contribution to journalArticle

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Abstract

We report an experimental demonstration of controlling plasma flow direction with a magnetic nozzle consisting of multiple coils. Four coils are controlled separately to form an asymmetric magnetic field to change the direction of laser-produced plasma flow. The ablation plasma deforms the topology of the external magnetic field, forming a magnetic cavity inside and compressing the field outside. The compressed magnetic field pushes the plasma via the Lorentz force on a diamagnetic current: j × B in a certain direction, depending on the magnetic field configuration. Plasma and magnetic field structure formations depending on the initial magnetic field were simultaneously measured with a self-emission gated optical imager and B-dot probe, respectively, and the probe measurement clearly shows the difference of plasma expansion direction between symmetric and asymmetric initial magnetic fields. The combination of two-dimensional radiation hydrodynamic and three-dimensional hybrid simulations shows the control of the deflection angle with different number of coils, forming a plasma structure similar to that observed in the experiment.

Original languageEnglish
Article number8910
JournalScientific reports
Volume7
Issue number1
DOIs
Publication statusPublished - Dec 1 2017

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magnetic nozzles
magnetohydrodynamic flow
laser plasmas
coils
magnetic fields
magnetic field configurations
probes
Lorentz force
compressing
ablation
light emission
deflection
topology
hydrodynamics
cavities
expansion
radiation

All Science Journal Classification (ASJC) codes

  • General

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Control of unsteady laser-produced plasma-flow with a multiple-coil magnetic nozzle. / Morita, Taichi; Edamoto, Masafumi; Miura, Satoshi; Sunahara, Atsushi; Saito, Naoya; Itadani, Yutaro; Kojima, Tomihiko; Mori, Yoshitaka; Johzaki, Tomoyuki; Kajimura, Yoshihiro; Fujioka, Shinsuke; Yogo, Akifumi; Nishimura, Hiroaki; Nakashima, Hideki; Yamamoto, Naoji.

In: Scientific reports, Vol. 7, No. 1, 8910, 01.12.2017.

Research output: Contribution to journalArticle

Morita, T, Edamoto, M, Miura, S, Sunahara, A, Saito, N, Itadani, Y, Kojima, T, Mori, Y, Johzaki, T, Kajimura, Y, Fujioka, S, Yogo, A, Nishimura, H, Nakashima, H & Yamamoto, N 2017, 'Control of unsteady laser-produced plasma-flow with a multiple-coil magnetic nozzle', Scientific reports, vol. 7, no. 1, 8910. https://doi.org/10.1038/s41598-017-09273-3
Morita, Taichi ; Edamoto, Masafumi ; Miura, Satoshi ; Sunahara, Atsushi ; Saito, Naoya ; Itadani, Yutaro ; Kojima, Tomihiko ; Mori, Yoshitaka ; Johzaki, Tomoyuki ; Kajimura, Yoshihiro ; Fujioka, Shinsuke ; Yogo, Akifumi ; Nishimura, Hiroaki ; Nakashima, Hideki ; Yamamoto, Naoji. / Control of unsteady laser-produced plasma-flow with a multiple-coil magnetic nozzle. In: Scientific reports. 2017 ; Vol. 7, No. 1.
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