Resonantly laser-driven plasma waves for electron acceleration

Donald P Umstadter, J. Kim, E. Esarey, E. Dodd, T. Neubert

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

A method for generating large-amplitude nonlinear plasma waves, which utilizes an optimized train of independently adjustable, intense laser pulses, is analyzed in one dimension both theoretically and numerically (using both Maxwell-fluid and particle-in-cell codes). Optimal pulse widths and interpulse spacings are computed for pulses with either square or finite-rise-time sine shapes. A resonant region of the plasma wave phase space is found where the plasma wave is driven most efficiently by the laser pulses. The width of this region, and thus the optimal finite-rise-time laser pulse width, was found to decrease with increasing background plasma density and plasma wave amplitude, while the nonlinear plasma wavelength, and thus the optimal interpulse spacing, increases. Also investigated are damping of the wave by trapped background electrons and the sensitivities of the resonance to variations in the laser and plasma parameters. Resonant excitation is found to be superior for electron acceleration to either beat-wave or single-pulse excitation because comparable plasma-wave amplitudes may be generated at lower plasma densities, reducing electron-phase detuning, or at lower laser intensities, reducing laser-plasma instabilities. Practical experimental methods for producing the required pulse trains are discussed.

Original languageEnglish (US)
Pages (from-to)3484-3497
Number of pages14
JournalPhysical Review E
Volume51
Issue number4
DOIs
StatePublished - Jan 1 1995

Fingerprint

electron acceleration
plasma waves
Plasma
Electron
Laser
pulses
lasers
plasma density
pulse duration
spacing
Maxwell fluids
magnetohydrodynamic stability
Spacing
laser plasmas
excitation
Excitation
synchronism
electrons
damping
Maxwell Fluid

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Mathematical Physics
  • Condensed Matter Physics
  • Physics and Astronomy(all)

Cite this

Resonantly laser-driven plasma waves for electron acceleration. / Umstadter, Donald P; Kim, J.; Esarey, E.; Dodd, E.; Neubert, T.

In: Physical Review E, Vol. 51, No. 4, 01.01.1995, p. 3484-3497.

Research output: Contribution to journalArticle

Umstadter, Donald P ; Kim, J. ; Esarey, E. ; Dodd, E. ; Neubert, T. / Resonantly laser-driven plasma waves for electron acceleration. In: Physical Review E. 1995 ; Vol. 51, No. 4. pp. 3484-3497.
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