期刊
PHYSICS OF PLASMAS
卷 22, 期 12, 页码 -出版社
AIP Publishing
DOI: 10.1063/1.4938038
关键词
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资金
- DFG [TR18]
- EU FP7
- EuCARD2
- BMBF
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. (C) 2015 AIP Publishing LLC.
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