Very efficient generation of a high-charge electron beam by a laser pulse propagating in a self-trapping mode in near-critical density plasma makes it possible to produce a high yield of gamma rays for radiography of samples located deep in a dense medium. The three-dimensional particle-in-cell and Monte Carlo simulations performed with end-to-end modeling from laser–plasma interaction to the final gamma-imaging of deeply shielded objects located at distances up to several meters clearly demonstrate the promise of laser pulses of several hundred TW for single-shot radiography by using a high-performance scheme of electron acceleration in the laser pulse self-trapping regime. This is illustrated by two examples with the same laser–target design used for a bremsstrahlung gamma source and an all-optical nonlinear inverse Compton source.

中文翻译：

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在自陷区中用来自激光加速电子的伽马射线进行屏蔽射线照相

通过在近临界密度等离子体中以自陷模式传播的激光脉冲非常高效地产生高电荷电子束，使得可以产生高产量的伽马射线，以便对位于稠密介质深处的样品进行射线照相。从激光-等离子体相互作用到距离最远几米的深层屏蔽物体的最终伽玛成像进行的端到端建模，进行了三维粒子模拟和蒙特卡洛模拟，清楚地证明了激光脉冲的前景通过在激光脉冲自陷机制中使用电子加速的高性能方案，对单次射线照相进行数百TW的测量。这有两个示例，它们用-致辐射伽马射线源和全光学非线性逆康普顿源使用了相同的激光靶设计。