Journal
APPLIED SCIENCES-BASEL
Volume 11, Issue 6, Pages -Publisher
MDPI
DOI: 10.3390/app11062560
Keywords
bright electron beams; laser-plasma wakefield accelerator; plasma shockwave
Categories
Funding
- National Natural Science Foundation of China [11991072, 11904377, 11875065, 11974251, 11127901]
- National Key Laboratory of Shock Wave and Detonation Physics [6142A03182011]
- CAS Youth Innovation Promotion Association [Y201952]
- Shanghai Sailing Program [18YF1426000]
- Natural Science Foundation of Shanghai [18JC1414800, 18ZR1444500]
- Strategic Priority Research Program (B) [XDB16]
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The research team optimized and improved the properties of laser-wakefield-accelerated electron beams through controllable shock-induced density down-ramp injection, achieving tunable electron beams. High reproducibility electron beams were generated in experiments with good energy spread and divergence, facilitating practical applications for advanced accelerator beam sources.
We demonstrate a simple but efficient way to optimize and improve the properties of laser-wakefield-accelerated electron beams (e beams) based on a controllable shock-induced density down-ramp injection that is achieved with an inserted tunable shock wave. The e beams are tunable from 400 to 800 MeV with charge ranges from 5 to 180 pC. e beams with high reproducibility (of similar to 95% in consecutive 100 shots) were produced in elaborate experiments with an average root- mean-square energy spread of 0.9% and an average divergence of 0.3 mrad. Three-dimensional particle-in-cell (PIC) simulations were also performed to accordingly verify and uncover the process of the injection and the acceleration. These tunable e beams will facilitate practical applications for advanced accelerator beam sources.
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