Fig. 4: Measurement of the highest peak energies μE achieved at different plasma densities npe, with and without a gradient in the plasma density. | Nature

Fig. 4: Measurement of the highest peak energies μE achieved at different plasma densities npe, with and without a gradient in the plasma density.

From: Acceleration of electrons in the plasma wakefield of a proton bunch

Fig. 4

The error bars arise from the position–energy conversion. The gradients chosen are those that were observed to maximize the energy gain. Acceleration to 2.0 ± 0.1 GeV is achieved with a plasma density of 6.6 × 1014 cm−3 with a density difference of +2.2% ± 0.1% over 10 m.

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