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arXiv 2005.14389physics.opticsphysics.acc-ph
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米级等离子体波导中的光波导

Optical guiding in meter-scale plasma waveguides

B. Miao, L. Feder, J. E. Shrock, A. Goffin, H. M. Milchberg

摘要:

我们展示了一种新的高度可调技术,用于产生米级低密度等离子体波导。这种波导可以使电子在单个阶段加速到数十GeV。利用两个时间间隔的贝塞尔光束脉冲诱导的光场电离在氢气中压印等离子体波导:第一个脉冲,J_0光束,产生波导的芯,而延迟的第二个脉冲,这里是J_8或J_16光束,产生波导包层。我们演示了在轴上等离子体密度低至N_e0= 5 × 10^16 cm^-3的情况下,强激光脉冲在数百个瑞利长度上的导引。

英文摘要:

We demonstrate a new highly tunable technique for generating meter-scale low density plasma waveguides. Such guides can enable electron acceleration to tens of GeV in a single stage. Plasma waveguides are imprinted in hydrogen gas by optical field ionization induced by two time-separated Bessel beam pulses: The first pulse, a J_0 beam, generates the core of the waveguide, while the delayed second pulse, here a J_8 or J_16 beam, generates the waveguide cladding. We demonstrate guiding of intense laser pulses over hundreds of Rayleigh lengths with on axis plasma densities as low as N_e0=5x10^16 cm^-3.

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