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Effective coupling of ultraintense laser pulse to funnel-mouthed plasma waveguides

Phys. Plasmas 12, 043105 (2005); doi:10.1063/1.1862248

Published 17 March 2005

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Jianzhou Wu, James H. Cooley, and Thomas M. Antonsen, Jr.
Institute for Research in Electronics and Applied Physics and Department of Physics, University of Maryland, College Park, Maryland 20742

Howard M. Milchberg
Institute for Physical Science and Technology, University of Maryland, College Park, Maryland 20742
The injection of laser pulses into hydrodynamically preformed plasma channels can be hindered by the conditions at the entrance of the channel. In particular, neutral gas and narrowing of the channel prevent efficient coupling of laser pulse entering into the channel. To solve this problem, a funnel-shaped plasma lens can be grafted onto the channel using an auxiliary formation pulse. Simulations of channel formation show that such a funnel can be made in the density ramp of a gas jet. Simulations of laser pulse propagation show that such a funnel efficiently couples pulse energy into the channel. For a backfill target with a funnel, the coupling efficiency is lower and required funnel parameters are more restrictive than for the gas jet case. ©2005 American Institute of Physics
History: Received 24 November 2004; accepted 4 January 2005; published 17 March 2005
Permalink: http://link.aip.org/link/?PHPAEN/12/043105/1
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KEYWORDS and PACS

Keywords
PACS
  • 52.38.Dx
    Laser light absorption in plasmas including collisional, parametric, etc
  • 52.40.Fd
    Plasma interactions with antennas; plasma-filled waveguides
  • 52.65.-y
    Plasma simulation
  • 52.75.-d
    Plasma devices
  • 52.25.Ya
    Neutrals in plasma
  • YEAR: 2005

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PUBLICATION DATA

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