Longitudinal instabilities affecting the moving critical layer laser-plasma ion accelerators
File(s)
Accepted version
Author(s)
Sahai, AA
Katsouleas, TC
Type
Conference Paper
Abstract
In this work we analyze the longitudinal instabilities of propagating
acceleration structures that are driven by a relativistically intense laser at
the moving plasma critical layer [1]. These instabilities affect the
energy-spectra of the accelerated ion-beams in propagating critical layer
acceleration schemes [2][3]. Specifically, using analytical theory and PIC
simulations we look into three fundamental physical processes and their
interplay that are crucial to the understanding of energy spectral control by
making the laser-plasma ion accelerators stable. The interacting processes are
(i) Doppler-shifted ponderomotive bunching [1][4] (ii) potential quenching by
beam-loading [2] and (iii) two-stream instabilities. These phenomenon have been
observed in simulations analyzing these acceleration processes [5][6][7]. From
the preliminary models and results we present in this work, we can infer
measures by which these instabilities can be controlled [8] for improving the
energy-spread of the beams.
acceleration structures that are driven by a relativistically intense laser at
the moving plasma critical layer [1]. These instabilities affect the
energy-spectra of the accelerated ion-beams in propagating critical layer
acceleration schemes [2][3]. Specifically, using analytical theory and PIC
simulations we look into three fundamental physical processes and their
interplay that are crucial to the understanding of energy spectral control by
making the laser-plasma ion accelerators stable. The interacting processes are
(i) Doppler-shifted ponderomotive bunching [1][4] (ii) potential quenching by
beam-loading [2] and (iii) two-stream instabilities. These phenomenon have been
observed in simulations analyzing these acceleration processes [5][6][7]. From
the preliminary models and results we present in this work, we can infer
measures by which these instabilities can be controlled [8] for improving the
energy-spread of the beams.
Date Issued
2016-10-28
Date Acceptance
2014-08-10
Citation
American Institute of Physics Conference Proceedings, 2016, 1777 (1)
Publisher
AIP
Journal / Book Title
American Institute of Physics Conference Proceedings
Volume
1777
Issue
1
Copyright Statement
© 2016 Author(s).
Identifier
http://arxiv.org/abs/1411.2401v1
Source
Advanced Accelerator Workshop 2014
Subjects
Plasma physics
Computational physics
Accelerator physics
Notes
submitted to the proceeding of the Advanced Accelerator Concepts workshop July 2014, San Jose, CA, USA
Publication Status
Published
Start Date
2014-07-13
Finish Date
2014-07-18
Coverage Spatial
San Jose, CA
Date Publish Online
2016-10-28