Emittance Measurements of a Laser-Wakefield-Accelerated Electron Beam

Abstract : The transverse emittance of a relativistic electron beam generated by the interaction of a high-intensity laser with an underdense plasma has been measured with the “pepper-pot” method. For parameters pertaining to the forced laser wakefield regime, we have measured an emittance as low as (2.7±0.9) π   mm mrad for (55±2)   MeV electrons. These measurements are consistent with 3D particle-in-cell simulations of the experiment, which additionally show the existence of a relatively large halo around the beam core.
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Submitted on : Thursday, August 5, 2010 - 4:25:41 PM
Last modification on : Wednesday, July 3, 2019 - 10:48:02 AM

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S. Fritzler, E. Lefebvre, Victor Malka, Frédéric Burgy, A.E. Dangor, et al.. Emittance Measurements of a Laser-Wakefield-Accelerated Electron Beam. Physical Review Letters, American Physical Society, 2004, 92 (16), pp.165006. ⟨10.1103/PhysRevLett.92.165006⟩. ⟨hal-00508778⟩

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