Journal
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
Volume 829, Issue -, Pages 63-66Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nima.2016.01.063
Keywords
AWAKE experiment; Self-modulation instability; CERN; Proton-driven plasma wakefield acceleration
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Funding
- Russian Science Foundation [14-12-00043] Funding Source: Russian Science Foundation
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Presently available high-energy proton beams in circular accelerators carry enough momentum to accelerate high-intensity electron and positron beams to the TeV energy scale over several hundred meters of the plasma with a density of about 10(15) cm(-3). However, the plasma wavelength at this density is 100-1000 times shorter than the typical longitudinal size of the high-energy proton beam. Therefore the self-modulation instability (SMI) of a long (similar to 10 cm) proton beam in the plasma should be used to create the train of micro-bunches which would then drive the plasma wake resonantly. Changing the plasma density profile offers a simple way to control the development of the SMI and the acceleration of particles during this process. We present simulations of the possible use of a plasma density gradient as a way to control the acceleration of the electron beam during the development of the SMI of a 400 GeV proton beam in a 10 m long plasma. This work is done in the context of the AWAKE project the proof-of-principle experiment on proton driven plasma wakefield acceleration at CERN. (C) 2016 The Authors. Published by Elsevier B.V.
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