Measurements of electron beam ring structures from laser wakefield accelerators

2019 ◽  
Vol 61 (6) ◽  
pp. 065012
Author(s):  
K Behm ◽  
A Hussein ◽  
T Z Zhao ◽  
S Dann ◽  
B X Hou ◽  
...  
Keyword(s):  
Electron Beam ◽  
Laser Wakefield ◽  
Ring Structures ◽  
Wakefield Accelerators

scholarly journals Laser pulse-electron beam synergy effect on electron self-injection and higher energy gain in laser wakefield accelerators

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Sahar Barzegar ◽  
Ali Reza Niknam
Keyword(s):  
Electron Beam ◽  
Laser Pulse ◽  
Pulse Electron Beam ◽  
Energy Gain ◽  
Lower Plasma ◽  
Beam Position ◽  
Laser Wakefield ◽  
Strong Deformation ◽  
Bubble Regime ◽  
Wakefield Accelerators

AbstractA new scheme for injection and acceleration of electrons in wakefield accelerators is suggested based on the co-action of a laser pulse and an electron beam. This synergy leads to stronger wakefield generation and higher energy gain in the bubble regime. The strong deformation of the whole bubble leads to electron self-injection at lower laser powers and lower plasma densities. To predict the practical ranges of electron beam and laser pulse parameters an interpretive model is proposed. The effects of altering the initial electron beam position on self-trapping of plasma electrons are studied. It is observed that an ultra-short (25 fs), high charge (340 pC), 1 GeV electron bunch is produced by injection of a 280 pC electron beam in the decelerating phase of the 75 TW laser driven wakefield.

On electron betatron motion and electron injection in laser wakefield accelerators

2014 ◽  
Vol 56 (8) ◽  
pp. 084009
Author(s):  
T Matsuoka ◽  
C McGuffey ◽  
P G Cummings ◽  
S S Bulanov ◽  
V Chvykov ◽  
...  
Keyword(s):  
Electron Injection ◽  
Laser Wakefield ◽  
Betatron Motion ◽  
Wakefield Accelerators

Integrating current transformer calibration for charge measurement of electron beam generated in laser wakefield acceleration

2010 ◽  
Vol 22 (12) ◽  
pp. 2819-2823
Author(s):  
董克攻 Dong Kegong ◽  
朱斌 Zhu Bin ◽  
吴玉迟 Wu Yuchi ◽  
苏春晓 Su Chunxiao ◽  
于瑞珍 Yu Ruizhen ◽  
...  
Keyword(s):  
Electron Beam ◽  
Current Transformer ◽  
Laser Wakefield Acceleration ◽  
Charge Measurement ◽  
Wakefield Acceleration ◽  
Laser Wakefield

Developments in laser wakefield accelerators: From single-stage to two-stage

2015 ◽  
Vol 24 (1) ◽  
pp. 015205 ◽  
Author(s):  
Wen-Tao Li ◽  
Wen-Tao Wang ◽  
Jian-Sheng Liu ◽  
Cheng Wang ◽  
Zhi-Jun Zhang ◽  
...  
Keyword(s):  
Single Stage ◽  
Two Stage ◽  
Laser Wakefield ◽  
Wakefield Accelerators

scholarly journals Automation and control of laser wakefield accelerators using Bayesian optimization

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
R. J. Shalloo ◽  
S. J. D. Dann ◽  
J.-N. Gruse ◽  
C. I. D. Underwood ◽  
A. F. Antoine ◽  
...  
Keyword(s):  
Pulse Length ◽  
Bayesian Optimization ◽  
Machine Learning Techniques ◽  
Learning Techniques ◽  
Laser Wakefield ◽  
Accelerating Structure ◽  
Automation And Control ◽  
Laser Pulse Shape ◽  
And Control ◽  
Wakefield Accelerators

AbstractLaser wakefield accelerators promise to revolutionize many areas of accelerator science. However, one of the greatest challenges to their widespread adoption is the difficulty in control and optimization of the accelerator outputs due to coupling between input parameters and the dynamic evolution of the accelerating structure. Here, we use machine learning techniques to automate a 100 MeV-scale accelerator, which optimized its outputs by simultaneously varying up to six parameters including the spectral and spatial phase of the laser and the plasma density and length. Most notably, the model built by the algorithm enabled optimization of the laser evolution that might otherwise have been missed in single-variable scans. Subtle tuning of the laser pulse shape caused an 80% increase in electron beam charge, despite the pulse length changing by just 1%.

scholarly journals Exploiting multi-scale parallelism for large scale numerical modelling of laser wakefield accelerators

2013 ◽  
Vol 55 (12) ◽  
pp. 124011 ◽  
Author(s):  
R A Fonseca ◽  
J Vieira ◽  
F Fiuza ◽  
A Davidson ◽  
F S Tsung ◽  
...  
Keyword(s):  
Numerical Modelling ◽  
Large Scale ◽  
Multi Scale ◽  
Laser Wakefield ◽  
Wakefield Accelerators
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