Author: Gonsalves, A.J.
Paper Title Page
Petawatt Laser Guiding and Electron Beam Acceleration to 8 GeV in a Laser-Heated Capillary Discharge Waveguide  
  • A.J. Gonsalves
    LBNL, Berkeley, California, USA
  Funding: Office of Science, Office of High Energy Physics, of the U.S. Department of Energy under Contracts No. DE- AC02-05CH11231 and No. DE-FG02-12ER41798. NSF under Grant No. PHY-1632796
Laser plasma accelerators are able to generate large acceleration gradients, tens to hundreds of GV/m, several orders of magnitude larger than conventional radio frequency technology. To achieve high beam energies, preformed plasma waveguides can be used to mitigate laser diffraction of focused laser pulses, increasing the acceleration length and the energy gain for a given laser power. Here we report on guiding of relativistically intense laser pulses with PW peak power over 20 diffraction lengths by increasing the focusing strength of a capillary discharge waveguide using laser inverse Bremsstrahlung heating. This allowed production of electron beams with quasi-monoenergetic peaks in energy up to 7.8 GeV,* almost double what was previously demonstrated.**
* A. J. Gonsalves, et al., Phys. Rev. Lett. Phys. Rev. Lett. 122, 084801 (2018).
** W. P. Leemans, A. J. Gonsalves, et al., Phys. Rev. Lett. 113, 245002 (2014).
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