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Title: Laser-seeded modulation instability in a proton driver plasma wakefield accelerator

A new method for initiating the modulation instability (MI) of a proton beam in a proton driver plasma wakefield accelerator using a short laser pulse preceding the beam is presented. A diffracting laser pulse is used to produce a plasma wave that provides a seeding modulation of the proton bunch with the period equal to that of the plasma wave. Using the envelope description of the proton beam, this method of seeding the MI is analytically compared with the earlier suggested seeding technique that involves an abrupt truncation of the proton bunch. The full kinetic simulation of a realistic proton bunch is used to validate the analytic results. It is further used to demonstrate that a plasma density ramp placed in the early stages of the laser-seeded MI leads to its stabilization, resulting in sustained accelerating electric fields (of order several hundred MV/m) over long propagation distances (∼100–1000 m)
Authors:
; ; ;  [1] ;  [2]
  1. Department of Physics and Institute for Fusion Studies, The University of Texas at Austin, Austin, Texas 78712 (United States)
  2. Institut für Theoretische Physik I, Universität Düsseldorf, Düsseldorf 40225 (Germany)
Publication Date:
OSTI Identifier:
22218556
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 20; Journal Issue: 10; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 43 PARTICLE ACCELERATORS; COMPARATIVE EVALUATIONS; COMPUTERIZED SIMULATION; ELECTRIC FIELDS; LASERS; LIGHT TRANSMISSION; MODULATION; PLASMA DENSITY; PLASMA GUNS; PLASMA INSTABILITY; PLASMA SIMULATION; PLASMA WAVES; PROTON BEAMS; PROTONS; WAKEFIELD ACCELERATORS