Optical Guiding in Meter-Scale Plasma Waveguides
Optical Guiding in Meter-Scale Plasma Waveguides
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DOI：
10.1103/physrevlett.125.074801
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发表时间：
2020-08-14
影响因子：
8.6
通讯作者：
Milchberg, H. M.
中科院分区：
文献类型：
--
作者：
Miao, B.;Feder, L.;Milchberg, H. M.
我们展示了一种新的高可调谐技术，用于产生米级低密度等离子体波导。这样的导流器可以使激光驱动的电子在单级加速到几十GeV。等离子体波导是由两个时间分离的贝塞尔光束脉冲引起的光场电离在氢气中蚀刻的：第一个脉冲，J(0)束，产生波导的核心，而延迟的第二个脉冲，这里是J(8)或J（16）束，产生波导包层，从而可以广泛控制波导的密度、深度和模式限制。我们演示了引导数百瑞利长度的强激光脉冲，轴上等离子体密度低至N-e0，类似于5 x 10(16) cm（-3）。
We demonstrate a new highly tunable technique for generating meter-scale low density plasma waveguides. Such guides can enable laser-driven 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, enabling wide control of the guide's density, depth, and mode confinement. We demonstrate guiding of intense laser pulses over hundreds of Rayleigh lengths with on-axis plasma densities as low as N-e0 similar to 5 x 10(16) cm(-3).