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SUMMARY:Betatron Radiation in Laser-driven Electron Accelerators
DTSTART:20120910T103000
DTEND:20120910T113000
DTSTAMP:20261005T011504Z
UID:df9b0f7806aacaa53e7adbd7a10a952aa434a6959f4f055aa7de2676
CATEGORIES:Conferences - Seminars
DESCRIPTION:A. Döpp\, Institute for Theory of Statistical Physics\, RWT
 H Aachen University\, Aachen\, Germany\nThe advent of laser-driven electro
 n acceleration from underdense plasmas concurs with the development of nov
 el light sources. Beside the possibility of injecting laser-accelerated el
 ectrons in conventional insertion devices\, transverse oscillations in the
  plasma-channel that electrons perform during the acceleration process can
  lead to bright synchrotron-like radiation\, widely referred to as Betatro
 n radiation. The energy of this radiation extends into the hard x-ray regi
 me\,with an intensity maximum at ~1-10keV. A typical source size of severa
 l microns at milliradian divergence results in high spatial coherence and 
 a peak brightness of 10^4-5 photons/mrad^2 is reached. The presented work 
 concentrates on theoretical and experimental studies of the emitted radiat
 ion spectra.\n\nNumerical treatment involves Particle-In-Cell simulations 
 with particle tracking\, but is computationally very costly. As the radiat
 ion fields add up incoherently in the plasma wiggler regime\, a new numeri
 cal method interpolates over sinusoïdal trajectory elements. Due to this 
 approximation\, the radiation of whole electron bunches can be studied. De
 viations from the on-axis wiggler spectrum of mono-energetic electrons d2I
 =dWdw µ c2K22/3(c2)\, with c=w/wcrit\, are discussed. Numerical results a
 re in good agreement with measurements at Lund Laser Centre using a multi-
 terawatt Ti:sapphire laser.
LOCATION:PPB 019
STATUS:CONFIRMED
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