Single-stage plasma-based correlated energy spread compensation for ultrahigh 6D brightness electron beams

Manahan, G.G. and Habib, A.F. and Scherkl, P. and Delinikolas, P. and Beaton, A. and Knetsch, A. and Karger, O. and Wittig, G. and Heinemann, T. and Sheng, Z.M. and Cary, J.R. and Bruhwiler, D.L. and Rosenzweig, J.B. and Hidding, B. (2017) Single-stage plasma-based correlated energy spread compensation for ultrahigh 6D brightness electron beams. Nature Communications, 8 (15705). 15705. ISSN 2041-1723 (https://doi.org/10.1038/ncomms15705)

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Abstract

Plasma photocathode wakefield acceleration combines energy gains of tens of GeV m−1 with generation of ultralow emittance electron bunches, and opens a path towards 5D-brightness orders of magnitude larger than state-of-the-art. This holds great promise for compact accelerator building blocks and advanced light sources. However, an intrinsic by-product of the enormous electric field gradients inherent to plasma accelerators is substantial correlated energy spread—an obstacle for key applications such as free-electron-lasers. Here we show that by releasing an additional tailored escort electron beam at a later phase of the acceleration, when the witness bunch is relativistically stable, the plasma wave can be locally overloaded without compromising the witness bunch normalized emittance. This reverses the effective accelerating gradient, and counter-rotates the accumulated negative longitudinal phase space chirp of the witness bunch. Thereby, the energy spread is reduced by an order of magnitude, thus enabling the production of ultrahigh 6D-brightness beams.

ORCID iDs

Manahan, G.G. ORCID logoORCID: https://orcid.org/0000-0001-5570-3238, Habib, A.F. ORCID logoORCID: https://orcid.org/0000-0003-2108-8702, Scherkl, P. ORCID logoORCID: https://orcid.org/0000-0002-7505-3786, Delinikolas, P. ORCID logoORCID: https://orcid.org/0000-0003-1409-8486, Beaton, A. ORCID logoORCID: https://orcid.org/0000-0003-2950-3771, Knetsch, A., Karger, O., Wittig, G., Heinemann, T., Sheng, Z.M. ORCID logoORCID: https://orcid.org/0000-0002-8823-9993, Cary, J.R., Bruhwiler, D.L., Rosenzweig, J.B. and Hidding, B. ORCID logoORCID: https://orcid.org/0000-0002-5827-0041;
  • Item type:Article
    ID code:60819
    Dates:
    Date
    Event
    5 June 2017
    Published
    21 April 2017
    Accepted
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:05 Jun 2017 15:32
    Last modified:20 Nov 2024 01:14
    URI:https://strathprints.strath.ac.uk/id/eprint/60819
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