Diagnosis of bubble evolution in laser-wakefield acceleration via angular distributions of betatron x-rays

We present an indirect method to diagnose the electron beam behaviors and bubble dynamic evolution in a laser-wakefield accelerator. Four kinds of typical bubble dynamic evolution and, hence, electron beam behaviors observed in Particle-In-Cell simulations are identified correspondingly by simultane...

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Bibliographic Details
Published in:Applied physics letters 2014-10, Vol.105 (16)
Main Authors: Ma, Y., Chen, L. M., Hafz, N. A. M., Li, D. Z., Huang, K., Yan, W. C., Dunn, J., Sheng, Z. M., Zhang, J.
Format: Article
Language:English
Subjects:
ACCELERATION
ANGULAR DISTRIBUTION
Applied physics
BETATRONS
Bubbles
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
ELECTRON BEAMS
Electrons
ENERGY SPECTRA
Evolution
Laser beams
LASER RADIATION
Particle in cell technique
SIMULATION
VISIBLE RADIATION
WAKEFIELD ACCELERATORS
X RADIATION
X ray spectra
X-rays
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Summary:We present an indirect method to diagnose the electron beam behaviors and bubble dynamic evolution in a laser-wakefield accelerator. Four kinds of typical bubble dynamic evolution and, hence, electron beam behaviors observed in Particle-In-Cell simulations are identified correspondingly by simultaneous measurement of distinct angular distributions of the betatron radiation and electron beam energy spectra in experiment. The reconstruction of the bubble evolution may shed light on finding an effective way to better generate high-quality electron beams and enhanced betatron X-rays.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4900412