Enhanced dense attosecond electron bunch generation by irradiating an intense laser on a cone target
Enhanced dense attosecond electron bunch generation by irradiating an intense laser on a cone target
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通过在锥形靶上照射强激光来增强密集阿秒电子束的产生
DOI：
10.1063/1.4913984
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发表时间：
2015-03-01
影响因子：
2.2
通讯作者：
Yin, Yan
中科院分区：
文献类型：
--
作者：
Hu, Li-Xiang;Yu, Tong-Pu;Yin, Yan
通过使用二维粒子模拟，我们展示了增强的空间周期性阿秒电子聚束产生的平均密度约为10nc和截止能量高达380兆电子伏。这些聚束是在超短超强激光脉冲与锥形靶相互作用中获得的。激光振荡场周期性地拉出锥面电子，并通过激光有质动力使其向前加速。内锥壁可以有效地引导这些聚束，使其在锥内稳定传播，从而产生超密的高能阿秒电子。我们还考虑了激光和锥靶参数对聚束特性的影响。结果表明，在原锥尖上加装等离子体毛细管，可以在不产生明显发散的情况下，显著提高阿秒电子束的加速和传输。
By using two-dimensional particle-in-cell simulations, we demonstrate enhanced spatially periodic attosecond electron bunches generation with an average density of about 10nc and cut-off energy up to 380 MeV. These bunches are acquired from the interaction of an ultra-short ultra-intense laser pulse with a cone target. The laser oscillating field pulls out the cone surface electrons periodically and accelerates them forward via laser pondermotive force. The inner cone wall can effectively guide these bunches and lead to their stable propagation in the cone, resulting in overdense energetic attosecond electron generation. We also consider the influence of laser and cone target parameters on the bunch properties. It indicates that the attosecond electron bunch acceleration and propagation could be significantly enhanced without evident divergency by attaching a plasma capillary to the original cone tip.