Low-density hydrodynamic optical-field-ionized plasma channels generated with an axicon lens
Low-density hydrodynamic optical-field-ionized plasma channels generated with an axicon lens
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DOI：
10.1103/physrevaccelbeams.22.041302
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发表时间：
2019-04-10
影响因子：
1.7
通讯作者：
Hooker, S. M.
中科院分区：
文献类型：
--
作者：
Shalloo, R. J.;Arran, C.;Hooker, S. M.
我们演示了长、低密度流体动力光场电离 (HOFI) 等离子体通道中高强度激光脉冲的光学引导。轴锥透镜用于生成轴上电子密度低至 n(e) (0) = 1.5 x 10(17) cm(-3) 的 HOFI 等离子体通道，匹配光斑尺寸范围为 20 μm 小于或类似于 < W-M 小于或类似于 40 μm。演示了通过调节初始细胞压力和通道形成脉冲到达后的延迟来控制这些通道参数。对于峰值轴向强度为 4 x 10(17) W cm(-2) 的激光脉冲，在 5 Hz 的脉冲重复率下，可在超过 14 个瑞利范围内实现高度可重复的高质量引导，但受到可用通道形成激光和真空泵系统的限制。这种类型的等离子体通道似乎非常适合在准线性区域运行的多吉伏激光尾场加速器。
We demonstrate optical guiding of high-intensity laser pulses in long, low-density hydrodynamic optical-field-ionized (HOFI) plasma channels. An axicon lens is used to generate HOFI plasma channels with on-axis electron densities as low as n(e) (0) = 1.5 x 10(17) cm(-3) and matched spot sizes in the range 20 mu m less than or similar to< W-M less than or similar to 40 mu m. Control of these channel parameters via adjustment of the initial cell pressure and the delay after the arrival of the channel-forming pulse is demonstrated. For laser pulses with a peak axial intensity of 4 x 10(17) W cm(-2) , highly reproducible, high-quality guiding over more than 14 Rayleigh ranges is achieved at a pulse repetition rate of 5 Hz, limited by the available channel-forming laser and vacuum pumping system. Plasma channels of this type would seem to be well suited to multi-GeV laser wakefield accelerators operating in the quasilinear regime.