High quality electron beams from a plasma channel guided laser wakefield accelerator

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Laser driven accelerators, in which particles are accelerated by the electric field of a plasma wave driven by an intense laser, have demonstrated accelerating electric fields of hundreds of GV/m. These fields are thousands of times those achievable in conventional radiofrequency (RF) accelerators, spurring interest in laser accelerators as compact next generation sources of energetic electrons and radiation. To date however, acceleration distances have been severely limited by lack of a controllable method for extending the propagation distance of the focused laser pulse. The ensuing short acceleration distance results in low energy beams with 100% electron energy spread, limiting applications. ... continued below

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18 pages

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Geddes, C.G.R.; Toth, Cs.; van Tilborg, J.; Esarey, E.; Schroeder, C.B.; Bruhwiler, D. et al. July 8, 2004.

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Description

Laser driven accelerators, in which particles are accelerated by the electric field of a plasma wave driven by an intense laser, have demonstrated accelerating electric fields of hundreds of GV/m. These fields are thousands of times those achievable in conventional radiofrequency (RF) accelerators, spurring interest in laser accelerators as compact next generation sources of energetic electrons and radiation. To date however, acceleration distances have been severely limited by lack of a controllable method for extending the propagation distance of the focused laser pulse. The ensuing short acceleration distance results in low energy beams with 100% electron energy spread, limiting applications. Here we demonstrate that a relativistically intense laser can be guided by a preformed plasma density channel and that the longer propagation distance can result in electron beams of percent energy spread with low emittance and increased energy, containing >10{sup 9} electrons above 80 MeV. The preformed plasma channel technique forms the basis of a new class of accelerators, combining beam quality comparable to RF accelerators with the high gradients of laser accelerators to produce compact tunable high brightness electron and radiation sources.

Physical Description

18 pages

Notes

INIS; OSTI as DE00836978

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  • Journal Name: Nature; Journal Volume: 431; Journal Issue: 7008; Other Information: Submitted to Nature: Volume 431, No.7008; Journal Publication Date: 09/30/2004

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  • Report No.: LBNL--55732
  • Report No.: CBP Note-576
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 836978
  • Archival Resource Key: ark:/67531/metadc787547

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  • July 8, 2004

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  • Dec. 3, 2015, 9:30 a.m.

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  • Sept. 1, 2016, 7:12 p.m.

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Geddes, C.G.R.; Toth, Cs.; van Tilborg, J.; Esarey, E.; Schroeder, C.B.; Bruhwiler, D. et al. High quality electron beams from a plasma channel guided laser wakefield accelerator, article, July 8, 2004; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc787547/: accessed September 26, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.