Analysis of laser wakefield dynamics in capillary tubes

Details Analysis of laser wakefield dynamics in capillary tubes Analysis of laser wakefield dynamics in capillary tubes

Apr 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010njph...12d5024a&link_type=abstract

New Journal of Physics, Volume 12, Issue 4, pp. 045024 (2010).

Physics

4

Scientific paper

A general approach to the modifications of the spectrum of a laser pulse interacting with matter is elaborated and used for spectral diagnostics of laser wakefield generation in guiding structures. Analytical predictions of the laser frequency red shift due to the wakefield excited in a capillary waveguide are confirmed by self-consistent modeling results. The role of ionization blue shift, and nonlinear laser pulse and wakefield dynamics on the spectrum modification, is analyzed for recent experiments on plasma wave excitation by an intense laser pulse guided in hydrogen-filled glass capillary tubes up to 8 cm long. The dependence of the spectral frequency shift, measured as a function of filling pressure, capillary tube length and incident laser energy, is in excellent agreement with the simulation results, and the associated longitudinal accelerating field is in the range 1-10 GV m-1.

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