TITLE

On the nonlinearity of the Langmuir turbulence excited by a weak electron beam-plasma interaction

AUTHOR(S)
Nariyuki, Y.; Umeda, T.
PUB. DATE
May 2010
SOURCE
Physics of Plasmas;May2010, Vol. 17 Issue 5, p054506
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
In the present study, we analyze the data sets produced by a one-dimensional Vlasov–Poisson simulation of the weak electron beam-plasma instability to clarify the nonlinearity of the Langmuir turbulence excited by the weak-beam interaction. The growth of wave number modes is analyzed by using the momentum equation of the whole electrons. The analysis shows that the primary Langmuir wave mode is almost linear, while the nonlinear terms play important roles in the growth of the lower harmonic mode and the secondary higher harmonic mode. After the linear growth saturates, while the wave power of the primary mode is much larger than the other modes, linear and nonlinear interactions occurring in both lower harmonic and secondary higher harmonic modes are more active than those in the primary mode. Nonlinearity in the system comes from the advection rather than the ponderomotive forces.
ACCESSION #
51059785

 

Related Articles

  • Losses in a pulsed electron beam during its formation and extraction from the diode chamber of an accelerator. Pushkarev, A.; Novoselov, Yu.; Sazonov, R. // Instruments & Experimental Techniques;Sep2007, Vol. 50 Issue 5, p687 

    The results of experimental studies of the current and charge balance in the diode unit of the ?pU-500 high-current pulsed electron accelerator (an accelerating voltage of 350�500 keV, a half-height pulse duration of 60 ns, and a total kinetic electron energy of 250 J/pulse) during...

  • Investigation of the chaotic dynamics of an electron beam with a virtual cathode in an external magnetic field. Egorov, E.; Hramov, A. // Plasma Physics Reports;Aug2006, Vol. 32 Issue 8, p683 

    The effect of the strength of the focusing magnetic field on chaotic dynamic processes occurring in an electron beam with a virtual cathode, as well as on the processes whereby the structures form in the beam and interact with each other, is studied by means of two-dimensional numerical...

  • Multipeak emission of the fast electron beams along the target surface in ultrashort laser interaction with solid targets. Yuan, X. H.; Li, Y. T.; Xu, M. H.; Zheng, Z. Y.; Chen, M.; Liang, W. X.; Yu, Q. Z.; Zhang, Y.; Liu, F.; Bernhardt, J.; Wang, S. J.; Wang, Z. H.; Wei, Z. Y.; Zhao, W.; Zhang, J. // Physics of Plasmas;Jan2008, Vol. 15 Issue 1, p013106 

    The spatial and energy distributions of fast electrons emitted from foil targets irradiated by ultrashort intense laser pulses are measured. Four groups of collimated emissions of fast electrons along the front and rear target surfaces are observed for an incidence angle of <60°. This...

  • Relativistic ponderomotive forces. Bituk, D. R.; Fedorov, M. V. // Journal of Experimental & Theoretical Physics;Oct99, Vol. 89 Issue 4, p640 

    The interaction of a relativistic classical electron with an inhomogeneous electromagnetic field is investigated. In second-order perturbation theory the motion is separated into fast and slow motions, and the relativistic Newtonian equation is averaged over the fast oscillations. The rate of...

  • Time-dependent current-voltage relation in electron guns. Weon, Byung Mook; Je, Jung Ho // Journal of Applied Physics;2/1/2005, Vol. 97 Issue 3, p036101 

    We studied mathematical models for degradation behaviors of current and voltage in electron guns especially using oxide cathodes. We found that the current and the voltage, I(t) and V(t), follow the stretched exponential decay in oxide cathodes. On this basis, we derived a general expression for...

  • Onset and saturation of guide-field magnetic reconnection. Pritchett, P. L. // Physics of Plasmas;Jun2005, Vol. 12 Issue 6, p062301 

    The onset and saturation of collisionless magnetic reconnection in the presence of a guide field are investigated using two-dimensional particle-in-cell simulations in which the reconnection evolves out of the initial thermal noise in the current sheet and in which the resolution is sufficient...

  • Amplification of Light during the Scattering of a Relativistic Electron by a Nucleus in a Moderately Strong Field of a Circularly Polarized Light Wave. Roshchupkin, S. P.; Tsybul'nik, V. A. // Journal of Experimental & Theoretical Physics;May2005, Vol. 100 Issue 5, p884 

    The amplification (attenuation) factor of an electromagnetic wave during the scattering of a relativistic electron by a nucleus in a moderately strong field of a circularly polarized electromagnetic wave is studied theoretically. The effect of amplification of an electromagnetic field is...

  • Experimental study of the ponderomotive effects of a large amplitude microwave field on a... Hadjoudj, Y.; Pierre, Th. // Physics of Plasmas;Nov95, Vol. 2 Issue 11, p4363 

    Presents the results of an experimental study on the ponderomotive effects of a microwave field on a magnetized electron beam. Evaluation of the effect from the single particle or the fluid theories; Ponderomotive deflection in agreement with the single particle theory.

  • Emission of an intense large area electron beam from a slab of porous dielectric. Friedman, M.; Myers, M.; Hegeler, F.; Swanekamp, S. B.; Wolford, M. F.; Sethian, J. D.; Ludeking, L. // Journal of Applied Physics;12/15/2004, Vol. 96 Issue 12, p7714 

    Inserting a thick slab of porous dielectric (e.g., ceramic honeycomb) in front of the emitting surface of a large-area planar diode improves the electron beam emission uniformity, decreases the beam current rise and fall times, and maintains a more constant diode impedance. Particle-in-cell...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

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

Try another library?
Sign out of this library

Other Topics