Parametric study of high-energy ring-shaped electron beams from a laser wakefield accelerator

Maitrallain, Antoine and Brunetti, Enrico and Streeter, Matthew and Kettle, Brendan and Spesyvtsev, Roman and Vieux, Gregory and Shahzad, Mohammed and Ersfeld, Bernhard and Yoffe, Samuel and Kornaszewski, Andrzej and Finlay, Oliver and Ma, Yong and Albert, Felicie and Bourgeois, Nicolas and Dann, Stephen JD and Lemos, Nuno and Cipiccia, Silvia and Cole, Jason M and González, Isabel Gallardo and Higginbotham, Andrew and Hussein, Amina and Šmíd, Michal and Falk, Katerina and Krushelnick, Karl and Lopes, Nelson C and Gerstmayr, Elias and Lumsdon, Caroline and Lundh, Olle and Mangles, Stuart and Najmudin, Zulfikar and Rageev, Pattahil P and Symes, Dan and Thomas, Alexander G R and Jaroszynski, Dino A (2021) Parametric study of high-energy ring-shaped electron beams from a laser wakefield accelerator. New Journal of Physics. ISSN 1367-2630

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    Abstract

    Laser wakefield accelerators commonly produce on-axis, low-divergence, high-energy electron beams. However, a high charge, annular shaped beam can be trapped outside the bubble and accelerated to high energies. Here we present a parametric study on the production of low-energy-spread, ultra-relativistic electron ring beams in a two-stage gas cell. Ring-shaped beams with energies higher than 750 MeV are observed simultaneously with on axis, continuously injected electrons. Often multiple ring shaped beams with different energies are produced and parametric studies to control the generation and properties of these structures were conducted. Particle tracking and particle-in-cell simulations are used to determine properties of these beams and investigate how they are formed and trapped outside the bubble by the wake produced by on-axis injected electrons. These unusual femtosecond duration, high-charge, high-energy, ring electron beams may find use in beam driven plasma wakefield accelerators and radiation sources.

    ORCID iDs

    Maitrallain, Antoine, Brunetti, Enrico ORCID logoORCID: https://orcid.org/0000-0001-8302-9762, Streeter, Matthew, Kettle, Brendan, Spesyvtsev, Roman, Vieux, Gregory ORCID logoORCID: https://orcid.org/0000-0003-4040-4117, Shahzad, Mohammed, Ersfeld, Bernhard ORCID logoORCID: https://orcid.org/0000-0001-5597-9429, Yoffe, Samuel ORCID logoORCID: https://orcid.org/0000-0002-6723-4990, Kornaszewski, Andrzej, Finlay, Oliver, Ma, Yong, Albert, Felicie, Bourgeois, Nicolas, Dann, Stephen JD, Lemos, Nuno, Cipiccia, Silvia, Cole, Jason M, González, Isabel Gallardo, Higginbotham, Andrew, Hussein, Amina, Šmíd, Michal, Falk, Katerina, Krushelnick, Karl, Lopes, Nelson C, Gerstmayr, Elias, Lumsdon, Caroline, Lundh, Olle, Mangles, Stuart, Najmudin, Zulfikar, Rageev, Pattahil P, Symes, Dan, Thomas, Alexander G R and Jaroszynski, Dino A ORCID logoORCID: https://orcid.org/0000-0002-3006-5492;