Perturbation-minimized triangular bunch for high-transformer ratio using a double dogleg emittance exchange beam line

Autor: G. Ha, M. H. Cho, W. Gai, K.-J. Kim, W. Namkung, J. G. Power
Jazyk: angličtina
Rok vydání: 2016
Předmět:
Zdroj: Physical Review Accelerators and Beams, Vol 19, Iss 12, p 121301 (2016)
Druh dokumentu: article
ISSN: 2469-9888
DOI: 10.1103/PhysRevAccelBeams.19.121301
Popis: The longitudinal shape, i.e., the current profile, of an electron bunch determines the transformer ratio in a collinear wakefield accelerator and thus methods are sought to control the longitudinal bunch shape. The emittance exchange (EEX) appears to be promising for creating a precisely controlled longitudinal bunch shapes. The longitudinal shape is perturbed by two sources: higher-order terms in the beam line optics and collective effects and these perturbations can lead to a significant drop of the transformer ratio. In this paper, we analytically and numerically investigate the perturbation to an ideal triangular longitudinal bunch shape and propose methods to minimize it.
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