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Bright X-ray radiation from plasma bubbles in an evolving laser wakefield accelerator

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 نشر من قبل Stuart Mangles
 تاريخ النشر 2017
  مجال البحث فيزياء
والبحث باللغة English
 تأليف M.S. Bloom




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We show that the properties of the electron beam and bright x-rays produced by a laser wakefield accelerator can be predicted if the distance over which the laser self-focuses and compresses prior to self-injection is taken into account. A model based on oscillations of the beam inside a plasma bubble shows that performance is optimised when the plasma length is matched to the laser depletion length. With a 200~TW laser pulse this results in an x-ray beam with median photon energy of unit[20]{keV}, $> 6times 10^{8}$ photons above unit[1]{keV} per shot and a peak brightness of $unit[3 times 10^{22}]{photons~s^{-1}mrad^{-2}mm^{-2} (0.1% BW)^{-1}}$.



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