TITLE

Anomalous momentum transport and plasma heating in a collisionless return-current beam plasma system: Multifluid and kinetic approaches

AUTHOR(S)
Kuang Wu Lee; Büchner, Jörg
PUB. DATE
April 2010
SOURCE
Physics of Plasmas;Apr2010, Vol. 17 Issue 4, p042308
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The anomalous transport in a one-dimensional (1D), collisionless return-current beam plasma system is studied by means of electrostatic Vlasov and three-fluid simulations in a current-free counterstreaming electron beam situation. Despite of a lack of binary collisions in both approaches, the electron bulk drifts are found to slow down due to collisionless momentum transport and the electrons are heated. It is shown that in the multifluid plasma description, charge separation effects play a major role in this process. A 1D electrostatic Vlasov code simulation is performed with the same macroscopic plasma parameters to investigate the momentum transport mechanism if kinetic effects are taken into account. A comparison of the two different approaches shows that a stronger drift relaxation takes place in the multifluid plasma approach. Also, in both approaches the same drift relaxation level is reached within the same time Δt≈700 ωpe-1. This is due to the common mechanism of anomalous transport—charge separation—in multifluid and kinetic approach during the initial stage of the electron beam relaxation. By carrying out a wave-particle interaction analysis in velocity space, it is shown that, however, the essentially kinetic effects Landau damping and particle trapping stop further current relaxation when the bulk drifts velocity has reached the thermal velocity value. In conclusion, it is argued that in this situation, an additional anomalous transport term is required for a complete multifluid plasma description of the electron beam relaxation.
ACCESSION #
50174254

 

Related Articles

  • The theory and simulation of relativistic electron beam transport in the ion-focused regime. Swanekamp, Stephen B.; Holloway, James Paul; Kammash, Terry; Gilgenbach, Ronald M. // Physics of Fluids B: Plasma Physics;May92, Vol. 4 Issue 5, p1332 

    Several recent experiments involving relativistic electron beam (REB) transport in plasma channels show two density regimes for efficient transport; a low-density regime known as the ion-focused regime (IFR) and a high-pressure regime. The results obtained in this paper use three separate models...

  • Small amplitude current free double layers in a collisionless plasma. Saharia, K.; Goswami, K. S. // Physics of Plasmas;Jun2007, Vol. 14 Issue 6, p062103 

    The existence of small amplitude double layers without relative electron and ion drift is reported. Solutions of these double layers exist only when the ratio of electron to ion temperature is less than unity. Electron densities and temperature profiles across the double layers are discussed.

  • Response to “Comment on ‘Electron parallel-flow shear driven low-frequency electromagnetic modes in collisionless magnetoplasma’ ” [Phys. Plasmas 13, 094701 (2006)]. Koepke, M. E.; Shukla, P. K.; Eliasson, B. // Physics of Plasmas;Sep2006, Vol. 13 Issue 9, p094702 

    The article discusses the research works of M.E. Koepke and others focussing on the physics of shear driven phenomenon. The author traces a correction to the article without which, the article appears incorrect. The author presents the generalized dispersion relation for the D’Angelo...

  • Electron Beam Interaction with Inhomogeneous Magnetized Cold Plasma. El-Shorbagy, Kh. H.; Monaquel, S. J. // International Journal of Basic & Applied Sciences;Apr2010, Vol. 10 Issue 2, p1 

    The interaction of an electron beam with inhomogeneous magnetized cold plasma resulting in increasing of beam plasma instability has been studied. The variation in the plasma density has a profound effect on the spatial beam plasma instability. In addition, an applied external static magnetic...

  • Progress In Research On Open - Ended Magnetic Traps. Kruglyakov, E. P.; Burdakov, A. V.; Ivanov, A. A. // AIP Conference Proceedings;2006, Vol. 812 Issue 1, p3 

    At present, three modern types of mirror machines for plasma confinement and heating exist in Novosibirsk (Multi-mirror,-GOL-3, Gas Dynamic Trap,-GDT, and Tandem Mirror,- AMBAL-M). From the engineering point of view all these systems are very attractive because of simple axisymmetric geometry of...

  • ICRF Heating in Magnetic Mirror Plasmas. Ichimura, M.; Higaki, H.; Saosaki, S.; Kano, H.; Kakimoto, S.; Tokumoto, K.; Yamaguchi, Y.; Hojo, H.; Inutake, M.; Yatsu, K. // Plasma Physics Reports;Sep2002, Vol. 28 Issue 9, p727 

    Waves in the ion cyclotron range of frequency are efficiently used to produce and heat magnetic mirror plasmas. In relatively low-density (lower than 10[sup 18]m[sup �3]) plasmas, the fast Alfv�n eigenmodes are formed in radial and axial directions and the excitation of these modes is...

  • Computationally efficient description of relativistic electron beam transport in collisionless plasma. Polomarov, Oleg; Sefkow, Adam B.; Kaganovich, Igor; Shvets, Gennady // Physics of Plasmas;Apr2007, Vol. 14 Issue 4, p043103 

    A reduced approach to modeling the electromagnetic Weibel instability and relativistic electron beam transport in collisionless background plasma is developed. Beam electrons are modeled by macroparticles and the background plasma is represented by electron fluid. Conservation of generalized...

  • Study of relativistic electron beam production and transport in high-intensity laser interaction with a wire target by integrated LSP modeling. Wei, M. S.; Solodov, A. A.; Pasley, J.; Stephens, R. B.; Welch, D. R.; Beg, F. N. // Physics of Plasmas;Aug2008, Vol. 15 Issue 8, p083101 

    The results of a numerical study of high-intensity short-pulse laser interaction with wire targets are presented. Fast electron production and transport in solid density plasma is modeled using the implicit hybrid particle-in-cell code LSP [D. R. Welch et al., Phys. Plasmas 13, 063105 (2006)]....

  • Trapping, Compression, and Acceleration of an Electron Beam by the Laser Wake Wave. Khachatryan, A. G. // JETP Letters;10/10/2001, Vol. 74 Issue 7, p371 

    The scheme of laser wake-field acceleration in plasma is proposed and considered for the case where a relatively rare nonrelativistic or weakly relativistic electron beam is initially situated ahead of the intense laser pulse. It is shown that an electron beam is trapped in the region of the...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

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

Try another library?
Sign out of this library

Other Topics