9 GeV energy gain in a beam-driven plasma wakefield accelerator

Abstract : An electron beam has gained a maximum energy of 9 GeV per particle in a 1.3 m-long electron beam-driven plasma wakefield accelerator. The amount of charge accelerated in the spectral peak was 28.3 pC, and the root-mean-square energy spread was 5.0%. The mean accelerated charge and energy gain per particle of the 215 shot data set was 115 pC and 5.3 GeV, respectively, corresponding to an acceleration gradient of 4.0 GeV/m at the spectral peak. The mean energy spread of the data set was 5.1%. These results are consistent with the extrapolation of the previously reported energy gain results using a shorter, 36 cm-long plasma source to within 10%, evincing a non-evolving wake structure that can propagate distances of over a meter in length. Wake-loading effects were evident in the data through strong dependencies observed between various spectral properties and the amount of accelerated charge.
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Plasma Physics and Controlled Fusion, IOP Publishing, 2016, 58, pp.034017. 〈10.1088/0741-3335/58/3/034017〉
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M Litos, E Adli, J M Allen, W An, C I Clarke, et al.. 9 GeV energy gain in a beam-driven plasma wakefield accelerator. Plasma Physics and Controlled Fusion, IOP Publishing, 2016, 58, pp.034017. 〈10.1088/0741-3335/58/3/034017〉. 〈hal-01337404〉

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