Oscillations of the collisionless sheath at grazing incidence of the magnetic field

Shoucri, M.; Gerhauser, H.; Finken, K. H.
October 2009
Physics of Plasmas;Oct2009, Vol. 16 Issue 10, p103506
Academic Journal
An Eulerian Vlasov code is used to study the physics of a collisionless sheath with grazing angles of incidence of the magnetic field. The electrons are treated with a parallel-B kinetic equation. In the case where the ion gyroradius is large compared to the Debye length, the electrons, frozen by the magnetic field line, have to move rapidly along the magnetic field B in their attempt to follow the ions gyrating perpendicular to B. Below a critical angle of incidence of the magnetic field, the large gyroradius ions can be scraped off at the plasma-wall interface of the sheath. The electrons now determine the characteristic time for information propagation, with low frequency oscillations appearing in the system. In the case where the ion gyroradius is reduced to the same order as the Debye length, the results evolve closer to those of the classical sheath, and the amplitude of the low frequency oscillations is reduced.


Related Articles

  • Perpendicular anisotropy dependence of oscillatory interlayer coupling behavior in [Pt/Co]5/Ru/[Co/Pt]5 multilayers. Zhao, J.; Wang, Y. J.; Liu, Y. Z.; Han, X. F.; Zhang, Z. // Journal of Applied Physics;Jul2008, Vol. 104 Issue 2, p023911 

    The experiments on the [t1Pt/0.4Co]5/(0.2–5.0)Ru/[0.4Co/t2Pt]5 (thickness unit is nm) multilayers with perpendicular anisotropy (PA) indicate that the interlayer coupling shows an antiferromagnetic (AF) and a ferromagnetic oscillatory behavior with the thickness of Ru spacer layers from 0...

  • Exchange-enhanced g-factors in an Al0.25Ga0.75N/GaN two-dimensional electron system. Cho, K. S.; Huang, Tsai-Yu; Huang, Chao-Ping; Chiu, Yi-Hsing; Liang, C.-T.; Chen, Y. F.; Lo, Ikai // Journal of Applied Physics;12/15/2004, Vol. 96 Issue 12, p7370 

    Low-temperature magnetotransport measurements were performed on an Al0.25Ga0.75N/GaN two-dimensional electron system. In this system, we observe Shubnikov-de Haas (SdH) oscillations in a perpendicular magnetic field B. By measuring the positions of a pair of spin-split SdH maxima, we are able to...

  • Transition scale at quasiperpendicular collisionless shocks: Full particle electromagnetic simulations. Scholer, Manfred; Burgess, David // Physics of Plasmas;Jun2006, Vol. 13 Issue 6, p062101 

    One-dimensional full particle simulations of almost perpendicular supercritical collisionless shocks over a wide Alfvén Mach number range are presented. The physical ion to electron mass ratio has been used; however, due to computer time limitations a value of the ratio of the electron plasma...

  • Heat transport in the quasi-single-helicity islands of EXTRAP T2R. Frassinetti, L.; Brunsell, P. R.; Drake, J. // Physics of Plasmas;Mar2009, Vol. 16 Issue 3, p032503 

    The heat transport inside the magnetic island generated in a quasi-single-helicity regime of a reversed-field pinch device is studied by using a numerical code that simulates the electron temperature and the soft x-ray emissivity. The heat diffusivity χe inside the island is determined by...

  • Thermoelectric power in carbon nanotubes and quantum wires of nonlinear optical, optoelectronic, and related materials under strong magnetic field: Simplified theory and relative comparison. Ghatak, K. P.; Bhattacharya, S.; Bhowmik, S.; Benedictus, R.; Choudhury, S. // Journal of Applied Physics;Feb2008, Vol. 103 Issue 3, p034303 

    We study thermoelectric power under strong magnetic field (TPM) in carbon nanotubes (CNTs) and quantum wires (QWs) of nonlinear optical, optoelectronic, and related materials. The corresponding results for QWs of III-V, ternary, and quaternary compounds form a special case of our generalized...

  • Heat diffusion across magnetic islands and ergodized plasma regions in realistic tokamak geometry. Hölzl, M.; Günter, S.; ASDEX Upgrade Team // Physics of Plasmas;Jul2008, Vol. 15 Issue 7, p072514 

    Heat diffusion in magnetized plasmas is investigated numerically for tokamak geometry and realistic plasma parameters. Heat transport across single and overlapping magnetic islands is studied. As an application, the influence of an (n+1,m+1) helical perturbation onto the temperature perturbation...

  • Effects of magnetic field and transverse anisotropy on full counting statistics in single-molecule magnet. Xue, Hai-Bin; Nie, Y.-H.; Li, Z.-J.; Liang, J.-Q. // Journal of Applied Physics;Apr2011, Vol. 109 Issue 8, p083706 

    We have theoretically studied the full counting statistics of electron transport through a single-molecule magnet (SMM) with an arbitrary angle between the applied magnetic field and the SMM's easy axis above the sequential tunneling threshold, since the angle θ cannot be controlled in...

  • Optical Injector Based on Particle Acceleration by Stimulated Emission of Radiation (PASER). Schächter, Levi // AIP Conference Proceedings;1/22/2008, Vol. 1086 Issue 1, p514 

    Employing a simple analytic model we demonstrate that electrons oscillating in a Penning trap may drain the energy stored in an active medium. For this process to happen, the ensemble of electrons must become bunched and the energy imparted to these electrons allows them to leave the trap...

  • Neutrinos: In and Out of the Standard Model. Parke, Stephen // AIP Conference Proceedings;2007, Vol. 885 Issue 1, p69 

    The particle physics Standard Model has been tremendously successful in predicting the outcome of a large number of experiments. In this model Neutrinos are massless. Yet recent evidence points to the fact that neutrinos are massive particles with tiny masses compared to the other particles in...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics