Perpendicular, magnetized, collisionless shocks in hydrogen and neon plasmas are studied with 2D particle-in-cell simulations for parameters accessible to experiments on OMEGA EP [Maywar et al., J. Phys.: Conf. Ser. 112, 032007 (2008)]. The simulations are performed with realistic ion-electron mass ratios by which the relative importance of different micro-instabilities can be accurately captured. The dispersion relation of the modified two-stream instability (MTSI), the main dissipation mechanism for these shocks, is used to find suitable parameters for upcoming experiments. Simulations show that magnetized collisionless shocks can be readily formed within a few tenths of an ion gyro-period in both hydrogen and neon gases, with a background magnetic field of 50 T, achievable using the magneto-inertial fusion electrical discharge system [Barnak et al., Rev. Sci. Instrum. 89, 033501 (2018)]. A portion of the ions are reflected to the upstream region and accelerated in both shock normal and tangential directions, indicating the formation of a supercritical shock. Shock front reformation is seen in longer time 1D simulations. The results show that the formation time and width of these shocks are determined by MTSI.
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July 2021
Research Article|
July 21 2021
Kinetic simulation study of magnetized collisionless shock formation on a terawatt laser system
Yu Zhang
;
Yu Zhang
1
Department of Mechanical Engineering, University of Rochester
, Rochester, New York 14627, USA
2
Laboratory for Laser Energetics, University of Rochester
, Rochester, New York 14623, USA
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Jonathan R. Davies
;
Jonathan R. Davies
1
Department of Mechanical Engineering, University of Rochester
, Rochester, New York 14627, USA
2
Laboratory for Laser Energetics, University of Rochester
, Rochester, New York 14623, USA
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Peter V. Heuer
;
Peter V. Heuer
2
Laboratory for Laser Energetics, University of Rochester
, Rochester, New York 14623, USA
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Chuang Ren
Chuang Ren
a)
1
Department of Mechanical Engineering, University of Rochester
, Rochester, New York 14627, USA
2
Laboratory for Laser Energetics, University of Rochester
, Rochester, New York 14623, USA
3
Department of Physics and Astronomy, University of Rochester
, Rochester, New York 14627, USA
a)Author to whom correspondence should be addressed: [email protected]
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a)Author to whom correspondence should be addressed: [email protected]
Phys. Plasmas 28, 072111 (2021)
Article history
Received:
March 19 2021
Accepted:
July 02 2021
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Citation
Yu Zhang, Jonathan R. Davies, Peter V. Heuer, Chuang Ren; Kinetic simulation study of magnetized collisionless shock formation on a terawatt laser system. Phys. Plasmas 1 July 2021; 28 (7): 072111. https://doi.org/10.1063/5.0050894
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