Electron self-injection in the proton-driven-plasma-wakefield acceleration

Journal Article · Sun Dec 15 04:00:00 EST 2013 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4848738· OSTI ID:22218364

Hu, Zhang-Hu; Wang, You-Nian ^[1]

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1. School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024 (China)

The self-injection process of plasma electrons in the proton-driven-plasma-wakefield acceleration scheme is investigated using a two-dimensional, electromagnetic particle-in-cell method. Plasma electrons are self-injected into the back of the first acceleration bucket during the initial bubble formation period, where the wake phase velocity is low enough to trap sufficient electrons. Most of the self-injected electrons are initially located within a distance of the skin depth c/ω{sub pe} to the beam axis. A decrease (or increase) in the beam radius (or length) leads to a significant reduction in the total charges of self-injected electron bunch. Compared to the uniform plasma, the energy spread, emittance and total charges of the self-injected bunch are reduced in the plasma channel case, due to a reduced injection of plasma electrons that initially located further away from the beam axis.

• OSTI ID: 22218364
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 12 Vol. 20; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ACCELERATION
BEAM BUNCHING
COMPARATIVE EVALUATIONS
ELECTRONS
PHASE VELOCITY
PLASMA
PLASMA BEAM INJECTION
PLASMA GUNS
PLASMA SIMULATION
PROTONS
TRAPS
TWO-DIMENSIONAL CALCULATIONS
WAKEFIELD ACCELERATORS