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Self-injection of electrons in a laser-wakefield accelerator by using longitudinal density ripple

Source: Appl. Phys. Lett. 96, 021501 (2010); doi:10.1063/1.3291674

Published 13 January 2010

KEYWORDS and PACS
Keywords
PACS
  • 52.35.-g
    Waves, oscillations, and instabilities in plasmas and intense beams
  • 52.38.Kd
    Laser-plasma acceleration of electrons and ions
  • 52.25.-b
    Plasma properties
  • 52.59.-f
    Intense particle beams and radiation sources in plasmas
  • YEAR: 2010
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PUBLICATION DATA
ISSN:
1553-9601 (online)
Publisher:
AIP is a member of CrossRef AIP
Deepak Dahiya,1 Vivek Sajal,2 and A. K. Sharma1
1Center for Energy Studies, Indian Institute of Technology Delhi, New Delhi-110016, India
2Department of Physics, Indian Institute of Technology Delhi, New Delhi-110016, India
By introducing a longitudinal density ripple (periodic modulation in background plasma density), we demonstrate self-injection of electrons in a laser-wakefield accelerator. The wakefield driven plasma wave, in presence of density ripple excites two side band waves of same frequency but different wave numbers. One of these side bands, having smaller phase velocity compared to wakefield driven plasma wave, preaccelerates the background plasma electrons. Significant number of these preaccelerated electrons get trapped in the laser-wakefield and further accelerated to higher energies. ©2010 American Institute of Physics
History: Received 15 May 2009; accepted 21 December 2009; published 13 January 2010
Permalink: http://link.aip.org/link/?APPLAB/96/021501/1

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