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Ion reflection by shock waves and pulse generation by cross-field ion beams

Part of: Solved and Unsolved problems in Plasma Physics

Published online by Cambridge University Press:  04 January 2017

Yukiharu Ohsawa
Yukiharu Ohsawa*
Affiliation:
Department of Physics, Nagoya University, Nagoya 464-8602, Japan
*
†Email address for correspondence: [email protected]
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Abstract

Comparisons are made of two different particle simulations: one for the study of plasma-based accelerators (Gueroult & Fisch, Phys. Plasmas, vol. 23, 2016, 032113) and the other for the study of shock formation in the interstellar medium (Yamauchi & Ohsawa, Phys. Plasmas, vol. 14, 2007, 053110). In the former, shock waves used for plasma density control create ion beams by reflection. In the latter, a fast and dense beam of exploding ions penetrates a surrounding plasma. In both simulations, magnetic bumps are generated from the motion of ion beams perpendicular to a magnetic field. Despite the apparent differences of their purposes, configurations and spatial scales, the two simulations show strong similarities in the generation processes and effects of the bumps, suggesting that these are not rare plasma phenomena. The bump created by the exploding ions develops into backward and forward magnetosonic pulses.

Keywords

plasma nonlinear phenomena
Type
Research Article
Information
Journal of Plasma Physics , Volume 83 , Issue 1 , February 2017 , 595830101
Copyright
© Cambridge University Press 2017 

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References

Adlam, J. H. & Allen, J. E. 1958 The structure of strong collision-free hydromagnetic waves. Phil. Mag. Suppl. 3, 448–455.CrossRefGoogle Scholar
Biskamp, D. & Welter, H. 1972 Numerical studies of magnetosonic collisionless shock waves. Nucl. Fusion 12, 663–666.Google Scholar
Carlson, P. 2012 A century of cosmic rays. Phys. Today 65, 30–36.CrossRefGoogle Scholar
Fermi, E. 1949 On the origin of the cosmic radiation. Phys. Rev. 75, 1169–1174.CrossRefGoogle Scholar
Forslund, D. W., Quest, K. B., Brackbill, J. U. & Lee, K. 1984 Collisionless dissipation in quasi-perpendicular shocks. J. Geophys. Res. 89, 2142–2150.Google Scholar
Gardner, C. S. & Morikawa, G. K. 1965 The effect of temperature on the width of a small-amplitude, solitary wave in a collision-free plasma. Commun. Pure Appl. Maths 18, 35–49.CrossRefGoogle Scholar
Gueroult, R. & Fisch, N. J. 2016 Practicality of magnetic compression for plasma density control. Phys. Plasmas 23, 032113.CrossRefGoogle Scholar
Joshi, C. & Katsouleas, T. 2003 Plasma accelerators at the energy frontier and on tabletops. Phys. Today 56, 47–53.Google Scholar
Katsouleas, T. & Dawson, J. M. 1983 Unlimited electron acceleration in laser-driven plasma waves. Phys. Rev. Lett. 51, 392–395.CrossRefGoogle Scholar
Kawashima, T., Miyahara, S. & Ohsawa, Y. 2003 Amplitude oscillation of shock waves in a magnetized plasma. J. Phys. Soc. Japan 72, 1664–1669.CrossRefGoogle Scholar
Miyahara, S., Kawashima, T. & Ohsawa, Y. 2003 Field strengths in oblique shock waves. Phys. Plasmas 10, 98–102.Google Scholar
Morawetz, C. S. 1961 Magnetohydrodynamic shock structure without collisions. Phys. Fluids 4, 988–1006.Google Scholar
Ohsawa, Y. 1985 Strong ion acceleration by a collisionless magnetosonic shock wave propagating perpendicularly to a magnetic field. Phys. Fluids 28, 2130–2136.Google Scholar
Ohsawa, Y. 1990 Conditions for ion reflection in a large-amplitude magnetosonic wave. J. Phys. Soc. Japan 59, 2782–2789.Google Scholar
Ohsawa, Y. 2014 Ultrarelativistic particle acceleration in collisionless shock waves. Phys. Rep. 536, 147–254.Google Scholar
Schmit, P. F. & Fisch, N. J. 2012 Plasma-based accelerators with magnetic compression. Phys. Rev. Lett. 109, 255003.Google Scholar
Spitzer, L. 1978 Physical Processes in the Interstellar Medium. Wiley-Interscience.Google Scholar
Tajima, T. & Dawson, J. M. 1979 Laser electron accelerator. Phys. Rev. Lett. 43, 267–270.Google Scholar
Takahashi, S., Sato, M. & Ohsawa, Y. 2008 Parallel electric fields in nonlinear magnetosonic waves in an electron-positron-ion plasma. Phys. Plasmas 15, 082309.Google Scholar
Tokar, R. L., Gary, S. P. & Quest, K. B. 1987 Electron heating by ion acoustic turbulence in simulated low Mach number shocks. Phys. Fluids 30, 2569–2575.Google Scholar
Yamauchi, K. & Ohsawa, Y. 2007 Shock formation processes in colliding two collisionless plasmas in a magnetic field. Phys. Plasmas 14, 053110.Google Scholar
Yamauchi, K. & Ohsawa, Y. 2008 Shock formation in a collision of two plasmas with their relative velocity oblique to the magnetic field. J. Phys. Soc. Japan 77, 054501.CrossRefGoogle Scholar