Ion motion in the wake driven by long particle bunches in plasmas

Journal Article · Thu May 15 00:00:00 EDT 2014 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4876620· OSTI ID:22300208

Vieira, J.; Silva, L. O. ^[1]; Fonseca, R. A. ^[1]; Mori, W. B. ^[2]

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1. GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001, Lisbon (Portugal)
2. Department of Physics and Astronomy, University of California, Los Angeles, Los Angeles, California 90095 (United States)

We explore the role of the background plasma ion motion in self-modulated plasma wakefield accelerators. We employ Dawson's plasma sheet model to derive expressions for the transverse plasma electric field and ponderomotive force in the narrow bunch limit. We use these results to determine the on-set of the ion dynamics and demonstrate that the ion motion could occur in self-modulated plasma wakefield accelerators. Simulations show the motion of the plasma ions can lead to the early suppression of the self-modulation instability and of the accelerating fields. The background plasma ion motion can nevertheless be fully mitigated by using plasmas with heavier plasmas.

• OSTI ID: 22300208
• Journal Information: Physics of Plasmas, Vol. 21, Issue 5; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ELECTRIC FIELDS
IONS
PLASMA
PLASMA INSTABILITY
PLASMA SHEET
PLASMA SIMULATION
PONDEROMOTIVE FORCE
WAKEFIELD ACCELERATORS