Plasma wakefield accelerator driven coherent spontaneous emission from an energy chirped electron pulse

Alotaibi, Badriah Mesfer and Al tuijri, Reem and Habib, Ahmad and Hala, Ahmad and Hidding, Bernhard and Khalil, Sherif Mohamed and McNeil, Brian and Traczykowski, Piotr (2020) Plasma wakefield accelerator driven coherent spontaneous emission from an energy chirped electron pulse. New Journal of Physics, 22 (1). 013037. ISSN 1367-2630

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    Abstract

    Plasma accelerators (Esaryet al2009Rev. Mod. Phys.811229) are a potentially important source of highenergy, low emittance electron beamswith high peak currents generated within a relatively short distance. As such, they may have an important application in the driving of coherent light sources such as the Free Electron Laser (FEL) which operate into the x-ray region (McNeil and Thompson 2010 Nat. Photon.4814–21). While novel plasma photocathodes (Hidding et al 2012 Phys. Rev. Lett. 108035001) may offer orders of magnitude improvement to the normalized emittance and brightness of electron beams compared to Radio Frequency-driven accelerators, a substantial challenge is the energy spread and chirp of beams, which can make FEL operation impossible. In this paper it is shown that such an energy-chirped, ultrahigh brightness electron beam, with dynamically evolving current profile due to ballistic bunching at moderate energies, can generate significant coherent radiation output via the process of Coherent Spontaneous Emission (CSE) (Campbell and McNeil 2012 Proc. FEL2012 (Nara, Japan)).While this CSE is seen to cause some FEL-induced electron bunching at the radiation wavelength, the dynamic evolution of the energy chirped pulse dampens out any high-gain FEL interaction. This work may offer the prospect of a future plasma driven FEL operating in the high-gain Self Amplified CSE mode.

    ORCID iDs

    Alotaibi, Badriah Mesfer ORCID logoORCID: https://orcid.org/0000-0002-9193-4022, Al tuijri, Reem, Habib, Ahmad ORCID logoORCID: https://orcid.org/0000-0003-2108-8702, Hala, Ahmad, Hidding, Bernhard ORCID logoORCID: https://orcid.org/0000-0002-5827-0041, Khalil, Sherif Mohamed, McNeil, Brian ORCID logoORCID: https://orcid.org/0000-0002-7267-611X and Traczykowski, Piotr ORCID logoORCID: https://orcid.org/0000-0003-4746-7698;
    • Item type:Article
      ID code:71058
      Dates:
      Date
      Event
      22 January 2020
      Published
      20 December 2019
      Published Online
      20 December 2019
      Accepted
      Keywords:plasma accelerators, Free Electron Lasers (FEL), x-ray, Coherent Spontaneous Emission (CSE), plasma photocathode, Plasma physics. Ionized gases, Physics and Astronomy(all)
      Subjects:Science > Physics > Plasma physics. Ionized gases
      Department:Faculty of Science > Physics
      Depositing user: Pure Administrator
      Date deposited:09 Jan 2020 15:05
      Last modified:15 Feb 2021 02:18
      URI:https://strathprints.strath.ac.uk/id/eprint/71058
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