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Physics of Plasmas / Volume 12 / Issue 5 / INVITED PAPERS / Lasers, Particle Beams, Accelerators, Radiation Generation

Phys. Plasmas 12, 056704 (2005); doi:10.1063/1.1871196 (7 pages)

Clean beams from laser wake-field accelerators via optical injection with a cleanup pulse a

a Paper HI2 3, Bull. Am. Phys. Soc. 49, 176 (2004).
John R. Cary1, R. E. Giacone1, C. Nieter1, and D. L. Bruhwiler2

1Center for Integrated Plasma Studies, University of Colorado at Boulder, Boulder, Colorado 80309
2Tech-X Corporation, 5621 Arapahoe Avenue, Suite A, Boulder, Colorado 80303

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(Received 22 November 2004; accepted 10 January 2005; published online 7 April 2005)

Multiple colliding-pulse injection schemes have been proposed as means for trapping electrons in the ultrashort acceleration buckets of laser-generated wake fields. The primary goal of this paper is to present a parameter study to determine the beams that can be obtained through collisions of collinear laser pulses in uniform plasma. The parameter study is through fully self-consistent, two-dimensional, particle-in-cell simulations, as previous work used only test-particle computations. To remove the multiple beams that can commonly be generated in colliding pulse injection, we use a cleanup pulse, a trailing laser pulse that absorbs the wake. The wake then no longer exists in the region where the trailing beamlets would be, and so the trailing beamlets no longer form. A series of simulations predicts that with such one can obtain single, short ( ⩽ 10 fs) beams with a bunch charge of order 10 pC, normalized emittance of order 2π μm, and energy spread of the order of 10%. The parameters of the beams are insensitive to the amplitude of the backward pulse above normalized amplitudes of abw ≈ 0.4.

© 2005 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. GENERATION OF MULTIPLE BEAMLETS
  3. SINGLE BEAMLET GENERATION USING A CLEANUP PULSE
    1. Calculation of cleanup pulse parameters
    2. Injection into a canceled wake
  4. PROPERTIES OF SINGLE BEAMLETS PRODUCED BY OPTICAL INJECTION
  5. CONCLUSIONS

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KEYWORDS and PACS

Keywords

plasma light propagation, plasma accelerators, wakefield accelerators, plasma simulation, plasma collision processes

PACS

  • 52.38.Dx

    Laser light absorption in plasmas (collisional, parametric, etc.)

  • 52.38.Kd

    Laser-plasma acceleration of electrons and ions

  • 52.20.-j

    Elementary processes in plasmas

  • 52.65.Rr

    Particle-in-cell method

ARTICLE DATA

Permalink
http://link.aip.org/link/doi/10.1063/1.1871196

PUBLICATION DATA

ISSN:

1070-664X (print)  
1089-7674 (online)

Publisher:

$abstract.society.value is a Member of CrossRef American Institute of Physics

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