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abstract:
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Recently, a scheme for producing ideal uniformly filled
ellipsoidal beam distributions, which depends on the
strong longitudinal expansion of an initially very short
beam under its own space charge forces, has been
demonstrated at the UCLA Pegasus Laboratory. Here we
present further work on the characterization of this novel
regime of operation of a photoinjector. In particular we
study the sensitivity of the generation of the uniformly
filled ellipsoidal distribution from the initial transverse
laser profile. The ultra-high brightness of the beam
created operating in this ‘blow-out’ regime is verified
obtaining high quality relativistic electron diffraction
patterns from thin Al foils.
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