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Betatron radiation enhancement by a density up-ramp in the bubble regime of LWFA
Author(s): Dominika Mašlárová; Vojtěch Horný; Miroslav Krus; Jan Psikal
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Paper Abstract

We examine betatron radiation properties from the bubble regime of laser-wakefield acceleration for a tailored plasma density profile. Previous studies have already discussed enhancement of radiation properties by using various density modifications in later acceleration phases. This paper will focus on a density profile with a short linear up-ramp and compare it with a uniform density case. The process is studied for standard parameters feasible with current sub-100 TW laser systems by means of numerical particle-in-cell simulations. We show here that the critical energy and intensity of radiation increase when the plasma density increases. This enhancement is caused either by electron energy gain in the rear part of the bubble or by oscillation amplitude boost by fields behind the bubble.

Paper Details

Date Published: 24 April 2019
PDF: 8 pages
Proc. SPIE 11037, Laser Acceleration of Electrons, Protons, and Ions V, 1103710 (24 April 2019); doi: 10.1117/12.2520980
Show Author Affiliations
Dominika Mašlárová, Institute of Plasma Physics of the CAS, v.v.i. (Czech Republic)
Czech Technical Univ. in Prague (Czech Republic)
Vojtěch Horný, Institute of Plasma Physics of the CAS, v.v.i. (Czech Republic)
Miroslav Krus, Institute of Plasma Physics of the CAS, v.v.i. (Czech Republic)
Jan Psikal, Czech Technical Univ. in Prague (Czech Republic)


Published in SPIE Proceedings Vol. 11037:
Laser Acceleration of Electrons, Protons, and Ions V
Eric Esarey; Carl B. Schroeder; Jörg Schreiber, Editor(s)

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