Study of laser plasma interactions in the relativistic regime

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We discuss the first experimental demonstration of electron acceleration by a laser wakefield over instances greater than a Rayleigh range (or the distance a laser normally propagates in vacuum). A self-modulated laser wakefield plasma wave is shown to have a field gradient that exceeds that of an RF linac by four orders of magnitude (E => 200 GV/m) and accelerates electrons with over 1-nC of charge per bunch in a beam with space-charge-limited emittance (1 mm-mrad). Above a laser power threshold, a plasma channel, created by the intense ultrashort laser pulse (I approx. 4 x1018 W/CM2, gamma = 1 micron, ... continued below

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17 pages; Other: FDE: PDF

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Umstadter, D. August 13, 1997.

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Description

We discuss the first experimental demonstration of electron acceleration by a laser wakefield over instances greater than a Rayleigh range (or the distance a laser normally propagates in vacuum). A self-modulated laser wakefield plasma wave is shown to have a field gradient that exceeds that of an RF linac by four orders of magnitude (E => 200 GV/m) and accelerates electrons with over 1-nC of charge per bunch in a beam with space-charge-limited emittance (1 mm-mrad). Above a laser power threshold, a plasma channel, created by the intense ultrashort laser pulse (I approx. 4 x1018 W/CM2, gamma = 1 micron, r = 400 fs), was found to increase the laser propagation distance, decrease the electron beam divergence, and increase the electron energy. The plasma wave, directly measured with coherent Thomson scattering is shown to damp-due to beam loading-in a duration of 1.5 ps or approx. 100 plasma periods. These results may have important implications for the proposed fast ignitor concept.

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17 pages; Other: FDE: PDF

Notes

INIS; OSTI as DE00016466

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  • Conference title not supplied, Conference location not supplied, Conference dates not supplied; Other Information: Supercedes report DE98051563; PBD: 13 Aug 1997

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  • Other: DE98051563
  • Report No.: UCRL-CR--128566
  • Report No.: CONF-9605138--
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 16466
  • Archival Resource Key: ark:/67531/metadc627369

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • August 13, 1997

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  • June 16, 2015, 7:43 a.m.

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  • Feb. 23, 2016, 12:29 p.m.

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Umstadter, D. Study of laser plasma interactions in the relativistic regime, article, August 13, 1997; California. (digital.library.unt.edu/ark:/67531/metadc627369/: accessed December 13, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.