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Author Farmer, J. P. ♦ Martorelli, R. ♦ Pukhov, A.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PLASMA PHYSICS AND FUSION TECHNOLOGY ♦ ACCELERATION ♦ BEAM BUNCHING ♦ BEAMS ♦ COMPUTERIZED SIMULATION ♦ PLASMA ♦ SATURATION ♦ TRANSFORMATIONS ♦ WAKEFIELD ACCELERATORS
Abstract We show that for beam-driven wakefield acceleration, the linearly ramped, equally spaced train of bunches typically considered to optimise the transformer ratio only works for flat-top bunches. Through theory and simulation, we explain that this behaviour is due to the unique properties of the plasma response to a flat-top density profile. Calculations of the optimal scaling for a train of Gaussian bunches show diminishing returns with increasing bunch number, tending towards saturation. For a periodic bunch train, a transformer ratio of 23 was achieved for 50 bunches, rising to 40 for a fully optimised beam.
ISSN 1070664X
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-12-15
Publisher Place United States
Journal Physics of Plasmas
Volume Number 22
Issue Number 12


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