Physics – Accelerator Physics
Scientific paper
2011-09-07
Phys. Rev. Lett. 108, 034801 (2012)
Physics
Accelerator Physics
4 pages, 6 figures
Scientific paper
10.1103/PhysRevLett.108.034801
We report on the successful experimental generation of electron bunches with ramped current profiles. The technique relies on impressing nonlinear correlations in the longitudinal phase space using a superconducing radiofrequency linear accelerator operating at two frequencies and a current-enhancing dispersive section. The produced $\sim 700$-MeV bunches have peak currents of the order of a kilo-Amp\`ere. Data taken for various accelerator settings demonstrate the versatility of the method and in particular its ability to produce current profiles that have a quasi-linear dependency on the longitudinal (temporal) coordinate. The measured bunch parameters are shown, via numerical simulations, to produce gigavolt-per-meter peak accelerating electric fields with transformer ratios larger than 2 in dielectric-lined waveguides.
Behrens Christopher
Dohlus Martin
Gerth Ch.
Lemery F.
Mihalcea D.
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