Tunable Electron Multibunch Production in Plasma Wakefield Accelerators
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Tunable Electron Multibunch Production in Plasma Wakefield Accelerators

  • Author(s): Hidding, B
  • Karger, O
  • Wittig, G
  • Aniculaesei, C
  • Jaroszynski, D
  • McNeil, BWJ
  • Campbell, LT
  • Islam, MR
  • Ersfeld, B
  • Sheng, Z-M
  • Xi, Y
  • Deng, A
  • Rosenzweig, JB
  • Andonian, G
  • Murokh, A
  • Hogan, MJ
  • Bruhwiler, DL
  • Cormier, E
  • et al.

Synchronized, independently tunable and focused $\mu$J-class laser pulses are used to release multiple electron populations via photo-ionization inside an electron-beam driven plasma wave. By varying the laser foci in the laboratory frame and the position of the underdense photocathodes in the co-moving frame, the delays between the produced bunches and their energies are adjusted. The resulting multibunches have ultra-high quality and brightness, allowing for hitherto impossible bunch configurations such as spatially overlapping bunch populations with strictly separated energies, which opens up a new regime for light sources such as free-electron-lasers.

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