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Dynamics of electron injection in a laser-wakefield accelerator_上海光学精密机械研究所

上海光学精密机械研究所 免费考研网/2018-05-06

外文题目: Dynamics of electron injection in a laser-wakefield accelerator
作者: Xu, J.; Buck, A.; Chou, S. -W.; Schmid, K.; Shen, B.; Tajima, T.; Kaluza, M. C.; Veisz, L.
刊名: Phys. Plasmas
年: 2017 卷: 24 期: 8 文章编号:83106
英文关键词:

PULSES; GENERATION; DRIVEN; FIELDS
英文摘要:
The detailed temporal evolution of the laser-wakefield acceleration process with controlled injection, producing reproducible high-quality electron bunches, has been investigated. The localized injection of electrons into the wakefield has been realized in a simple way-called shock-front injection-utilizing a sharp drop in plasma density. Both experimental and numerical results reveal the electron injection and acceleration process as well as the electron bunch's temporal properties. The possibility to visualize the plasma wave gives invaluable spatially resolved information about the local background electron density, which in turn allows for an efficient suppression of electron self-injection before the controlled process of injection at the sharp density jump. Upper limits for the electron bunch duration of 6.6 fs FWHM, or 2.8 fs (r. m. s.) were found. These results indicate that shock-front injection not only provides stable and tunable, but also few-femtosecond short electron pulses for applications such as ultrashort radiation sources, time-resolved electron diffraction or for the seeding of further acceleration stages. Published by AIP Publishing.


文献类型: 期刊论文
正文语种: English
收录类别: SCI
DOI: 10.1063/1.4996906


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