Effects of Coulomb coupling on friction in strongly magnetized plasmas

Bernstein, David J.

doi:10.1063/5.0048040

Cited by 9 publications

(3 citation statements)

References 35 publications

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“…External magnetic fields also play an important role in the context of inertial fusion concepts [25][26][27][28] . Previous theoretical work for strongly coupled magnetized plasmas has been performed, e.g., for transport properties [29][30][31][32][33] , stopping power and friction [34][35][36][37] , and waves [38][39][40][41][42][43][44][45] .…”

Section: Introductionmentioning

confidence: 99%

Dynamic structure factor and excitation spectrum of the one-component plasma: the case of weak to moderate magnetization

Kählert¹,

Bönitz²

2023

Preprint

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Magnetized plasmas are well known to exhibit a rich spectrum of collective modes.Here, we focus on the density modes in dense or cold plasmas, where strong coupling effects alter the mode spectrum known from traditional weakly coupled plasmas.In particular, we study the dynamic structure factor (DSF) of the magnetized onecomponent plasma with molecular dynamics simulations. Extending our previous results [H. Kählert and M. Bonitz, Phys. Rev. Research 2022, 4, 013197], it is shown that Bernstein modes can be observed in the weakly magnetized regime, where they are found below the upper hybrid frequency, provided the coupling strength is sufficiently low. We investigate the DSF for a variety of different wave numbers and plasma parameters and show that even small magnetization can give rise to a strong zero-frequency mode perpendicular to the magnetic field and change the dispersion as well as the damping of the upper hybrid mode.

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Section: Introductionmentioning

confidence: 99%

Dynamic structure factor and excitation spectrum of the one-component plasma: the case of weak to moderate magnetization

Kählert¹,

Bönitz²

2023

Preprint

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show abstract

“…[ 24 ] External magnetic fields also play an important role in the context of inertial fusion concepts. [ 25–28 ] Previous theoretical work for strongly coupled magnetized plasmas has been performed, for example, for transport properties, [ 29–33 ] stopping power and friction, [ 34–37 ] and waves. [ 38–45 ]…”

Section: Introductionmentioning

confidence: 99%

“…[24] External magnetic fields also play an important role in the context of inertial fusion concepts. [25][26][27][28] Previous theoretical work for strongly coupled magnetized plasmas has been performed, for example, for transport properties, [29][30][31][32][33] stopping power and friction, [34][35][36][37] and waves. [38][39][40][41][42][43][44][45] In this work, we focus on density correlations in the time and spatial domain by studying the dynamic structure factor (DSF) of the magnetized OCP.…”

Section: Introductionmentioning

confidence: 99%

Dynamic structure factor and excitation spectrum of the one‐component plasma: The case of weak to moderate magnetization

Kählert

Bönitz

2023

Contrib. Plasma Phys

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Magnetized plasmas are well known to exhibit a rich spectrum of collective modes. Here, we focus on the density modes in dense or cold plasmas, where strong coupling effects alter the mode spectrum known from traditional weakly coupled plasmas. In particular, we study the dynamic structure factor (DSF) of the magnetized one‐component plasma with molecular dynamics simulations. Extending our previous results (H. Kählert and M. Bonitz, Phys. Rev. Research 2022, 4, 013197), it is shown that Bernstein modes can be observed in the weakly magnetized regime, where they are found below the upper hybrid frequency, provided the coupling strength is sufficiently low. We investigate the DSF for a variety of different wave numbers and plasma parameters and show that even small magnetization can give rise to a strong zero‐frequency mode perpendicular to the magnetic field and change the dispersion as well as the damping of the upper hybrid mode.

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Collision term for uniformly magnetized plasmas

Dong

Zhang

Ding

2023

Rev. Mod. Plasma Phys.

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Collision process is crucial to the transport in magnetized plasmas. This article reviews the three typical approaches, i.e. the Fokker-Planck (FP) approach, the Bogoliubov-Born-Green-Kirwood-Yvon (BBGKY) approach, and the quasilinear (QL) approach, to deriving the kinetic equation for weakly coupled uniformly magnetized plasmas. The collision terms derived based on these three approaches are shown to be identical and satisfy the conservation laws and H theorem. Relatively speaking, the BBGKY and QL approaches are more systematic and readily to be generalized from weakly magnetized plasmas to strongly magnetized plasmas. The FP approach is pretty simple for weakly magnetized plasmas and has the advantage that the collision term derived based on it can be naturally separated into two parts, one part arising from the polarization and the other from the correlation of the fluctuating electrostatic field. However, the usual form of the FP equation is not suitable for strongly magnetized plasmas. To derive the magnetized collision term based on the FP approach, a general form of the FP equation for magnetized plasmas has to be found first.

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Effects of Coulomb coupling on friction in strongly magnetized plasmas

Cited by 9 publications

References 35 publications

Dynamic structure factor and excitation spectrum of the one-component plasma: the case of weak to moderate magnetization

Dynamic structure factor and excitation spectrum of the one-component plasma: the case of weak to moderate magnetization

Dynamic structure factor and excitation spectrum of the one‐component plasma: The case of weak to moderate magnetization

Collision term for uniformly magnetized plasmas

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