Electron yield enhancement in a laser wakefield accelerator driven by asymmetric laser pulses

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The effect of asymmetric laser pulses on electron yield from a laser wakefield accelerator has been experimentally studied using > 10{sup 19} cm{sup -3} plasmas and a 10 TW, > 45 fs, Ti:Al{sub 2}O{sub 3} laser. Laser pulse shape was controlled through non-linear chirp with a grating pair compressor. Pulses (76 fs FWHM) with a steep rise and positive chirp were found to significantly enhance the electron yield compared to pulses with a gentle rise and negative chirp. Theory and simulation show that fast rising pulses can generate larger amplitude wakes that seed the growth of the self-modulation instability and ... continued below

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Leemans, W.P.; Catravas, P.; Esarey, E.; Geddes, C.G.R.; Toth, C.; Trines, R. et al. August 1, 2002.

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The effect of asymmetric laser pulses on electron yield from a laser wakefield accelerator has been experimentally studied using > 10{sup 19} cm{sup -3} plasmas and a 10 TW, > 45 fs, Ti:Al{sub 2}O{sub 3} laser. Laser pulse shape was controlled through non-linear chirp with a grating pair compressor. Pulses (76 fs FWHM) with a steep rise and positive chirp were found to significantly enhance the electron yield compared to pulses with a gentle rise and negative chirp. Theory and simulation show that fast rising pulses can generate larger amplitude wakes that seed the growth of the self-modulation instability and that frequency chirp is of minimal importance for the experimental parameters.

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  • Journal Name: Physical Review Letters; Journal Volume: 8917; Journal Issue: 17; Other Information: Journal Publication Date: 10/21/2002

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  • Report No.: LBNL--51372
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 821644
  • Archival Resource Key: ark:/67531/metadc782026

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  • August 1, 2002

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  • Dec. 3, 2015, 9:30 a.m.

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  • Sept. 1, 2016, 7:11 p.m.

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Leemans, W.P.; Catravas, P.; Esarey, E.; Geddes, C.G.R.; Toth, C.; Trines, R. et al. Electron yield enhancement in a laser wakefield accelerator driven by asymmetric laser pulses, article, August 1, 2002; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc782026/: accessed August 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.