|TUP051||Plasma Accelerator Driven Coherent Spontaneous Emission||157|
Plasma accelerators  are a potentially important source of high energy, low emittance electron beams with 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 . While novel plasma photocathodes  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). 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.
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 L. T. Campbell and B. W. J. McNeil, 2012, in Proc. FEL2012
|Poster TUP051 [1.401 MB]|
|DOI •||reference for this paper ※ https://doi.org/10.18429/JACoW-FEL2019-TUP051|
|About •||paper received ※ 20 August 2019 paper accepted ※ 27 August 2019 issue date ※ 05 November 2019|
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