Optical probing of relativistic plasma singularities
Optical probing of relativistic plasma singularities
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DOI：
10.1063/5.0004525
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发表时间：
2019-03
影响因子：
2.2
通讯作者：
T. Esirkepov;J. Mu;Y. Gu;T. Jeong;P. Valenta;O. Klimo;J. Koga;M. Kando;D. Neely;G. Korn-G.
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文献类型：
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作者：
T. Esirkepov;J. Mu;Y. Gu;T. Jeong;P. Valenta;O. Klimo;J. Koga;M. Kando;D. Neely;G. Korn-G.
相对论等离子体的多流流动中的奇点可以有效地产生相干高频辐射，如相对论飞镜的概念所示[Bulanov et al., Phys.莱特牧师。 91, 085001 (2003)] 和奇点发射辐射的爆发增强 [Pirozhkov et al., Sci. 91, 085001 (2003)]报告 7, 17968 (2017)]。由于这些奇点的极端清晰度（数十纳米）、相对论速度和瞬态非局域性质，直接观察这些奇点具有挑战性。我们建议使用超快（几个光周期）光学探针来识别相对论等离子体奇点。我们的估计和细胞内粒子模拟表明这种诊断是可行的。
Singularities in multi-stream flows of relativistic plasmas can efficiently produce coherent high-frequency radiation, as exemplified in the concepts of the Relativistic Flying Mirror [Bulanov et al., Phys. Rev. Lett. 91, 085001 (2003)] and Burst Intensification by Singularity Emitting Radiation [Pirozhkov et al., Sci. Rep. 7, 17968 (2017)]. Direct observation of these singularities is challenging due to their extreme sharpness (tens of nanometers), relativistic velocity, and transient non-local nature. We propose to use an ultrafast (a few light cycles) optical probe for identifying relativistic plasma singularities. Our estimations and Particle-in-Cell simulations show that this diagnostic is feasible.