Speaker
Ms
Ligia Diana Amorim
(GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa)
Description
Plasma-based wakefield accelerators are promising configurations for future generation linear colliders. The E-209 experiment [1], currently running at SLAC-FACET was proposed to investigate key-physics of the self-modulated [2] plasma wakefield accelerator using uncompressed lepton bunches. Recent E-209 results show evidence of the self-modulation instability using several diagnostics including: coherent transition radiation (CTR), optical transition radiation and particles energy spectrum measurements. Here we present numerical simulations, performed with the fully-relativistic PIC code OSIRIS [3], using parameters that closely follow the experimental bunch and plasma ones. Numerical results indicate that the self-modulation can be detected by CTR diagnostics. In addition, simulations show the presence of a defocused electron/positron bunch halo as seen with the OTR diagnostics. Simulations suggest that the use of bunches with shorter rise times could enhance experimental self-modulation measurements [4].
[1] J.Vieira, et al., Phys .Plasmas 19, 063105 (2012)
[2] N.Kumar, et al., Phys.Rev.Lett.104, 255003 (2010)
[3] R. A. Fonseca, et al., Lect. Notes Comput. Sci. 2331, 342 (2002)
[4] J. Vieira, et al., Plasma Phys. Control Fusion 56, 084014 (2014)
Primary authors
Dr
Jorge Vieira
(Instituto Superior Tecnico)
Ms
Ligia Diana Amorim
(GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa)
