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Title: Plasma electron hole kinematics. II. Hole tracking Particle-In-Cell simulation

Authors:
; ORCiD logo
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1280201
Grant/Contract Number:
SC0010491
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 23; Journal Issue: 8; Related Information: CHORUS Timestamp: 2016-12-26 02:55:47; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics
Country of Publication:
United States
Language:
English

Citation Formats

Zhou, C., and Hutchinson, I. H.. Plasma electron hole kinematics. II. Hole tracking Particle-In-Cell simulation. United States: N. p., 2016. Web. doi:10.1063/1.4959871.
Zhou, C., & Hutchinson, I. H.. Plasma electron hole kinematics. II. Hole tracking Particle-In-Cell simulation. United States. doi:10.1063/1.4959871.
Zhou, C., and Hutchinson, I. H.. 2016. "Plasma electron hole kinematics. II. Hole tracking Particle-In-Cell simulation". United States. doi:10.1063/1.4959871.
@article{osti_1280201,
title = {Plasma electron hole kinematics. II. Hole tracking Particle-In-Cell simulation},
author = {Zhou, C. and Hutchinson, I. H.},
abstractNote = {},
doi = {10.1063/1.4959871},
journal = {Physics of Plasmas},
number = 8,
volume = 23,
place = {United States},
year = 2016,
month = 8
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1063/1.4959871

Citation Metrics:
Cited by: 2works
Citation information provided by
Web of Science

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  • The kinematics of a 1-D electron hole is studied using a novel Particle-In-Cell simulation code. A hole tracking technique enables us to follow the trajectory of a fast-moving solitary hole and study quantitatively hole acceleration and coupling to ions. We observe a transient at the initial stage of hole formation when the hole accelerates to several times the cold-ion sound speed. Artificially imposing slow ion speed changes on a fully formed hole causes its velocity to change even when the ion stream speed in the hole frame greatly exceeds the ion thermal speed, so there are no reflected ions. Themore » behavior that we observe in numerical simulations agrees very well with our analytic theory of hole momentum conservation and the effects of “jetting.”.« less
  • Cited by 2
  • We analyse the kinematic properties of a plasma electron hole: a non-linear self-sustained localized positive electric potential perturbation, trapping electrons, which behaves as a coherent entity. When a hole accelerates or grows in depth, ion and electron plasma momentum is changed both within the hole and outside, by an energization process we call jetting. We present a comprehensive analytic calculation of the momentum changes of an isolated general one-dimensional hole. The conservation of the total momentum gives the hole's kinematics, determining its velocity evolution. Our results explain many features of the behavior of hole speed observed in numerical simulations, includingmore » self-acceleration at formation, and hole pushing and trapping by ion streams.« less
  • A one-dimensional Monte Carlo collision-particle-in-cell plasma computer code was used to simulate plasma immersion ion implantation by applying a negative voltage pulse to the substrate while the reactor wall is grounded. The results presented here show the effect of short rise time pulses: for rise times shorter than the electron plasma period (typically 5 ns/kV), an electron shock wave is observed where a rapidly expanding sheath heats the electrons up to high energies. Many of these fast electrons are expelled from the plasma leading to a high plasma potential and thus to a high surface electric field on the earthedmore » electrode which could give rise to non-negligible electron field emission.« less
  • The collisional dynamics of a relativistic electron jet in a magnetized plasma are investigated within the framework of kinetic theory. The relativistic Fokker-Planck equation describing slowing down, pitch angle scattering, and cyclotron rotation is derived and solved. Based on the solution of this Fokker-Planck equation, an analytical formula for the root mean square spot size transverse to the magnetic field is derived and this result predicts a reduction in radial transport. Some comparisons with particle-in-cell simulation are made and confirm striking agreement between the theory and the simulation. For fast electron with 1 MeV typical kinetic energy interacting with amore » solid density hydrogen plasma, the energy deposition density in the transverse direction increases by a factor 2 for magnetic field of the order of 1 T. Along the magnetic field, the energy deposition profile is unaltered compared with the field-free case.« less