We study the influence of finite emittance electron bunches in the bubble regime of laser-driven wakefield acceleration onto the microscopic structure of the bunch itself. Using resilient backpropagation (Rprop) to find the equilibrium structure, we observe that for realistic and already observed emittances the previously found crystalline structures remain intact and are only widened marginally. Higher emittances lead to larger electron displacements within the crystal and finally its breaking.

中文翻译：

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气泡区中的有限发射维格纳晶体

我们研究了激光驱动尾流加速气泡区中有限发射电子束对束本身微观结构的影响。使用弹性反向传播 (Rprop) 来找到平衡结构，我们观察到对于现实和已经观察到的发射率，先前发现的晶体结构保持完整，并且只是略微加宽。更高的发射率导致晶体内更大的电子位移，最终导致晶体破裂。