X‐rays and forward ion emission from laser‐generated plasma in the Target Normal Sheath Acceleration regime of different targets with 10‐μm thickness, irradiated at Prague Asterix Laser System (PALS) laboratory at about 10¹⁶ W/cm² intensity, employing a 1,315 nm‐wavelength laser with a 300‐ps pulse duration, are investigated. The photon and ion emissions were mainly measured using Silicon Carbide (SiC) detectors in time‐of‐flight configuration and X‐ray streak camera imaging. The results show that the maximum proton acceleration value and the X‐ray emission yield growth are proportional to the atomic number of the irradiated targets. The X‐ray emission is not isotropic, with energies increasing from 1 keV for light atomic targets to about 2.5 keV for heavy atomic targets. The laser focal position significantly influences the X‐ray emission from light and heavy irradiated targets, indicating the possible induction of self‐focusing effects when the laser beam is focalized in front of the light target surface and of electron density enhancement for focalization inside the target.

中文翻译：

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PALS实验室通过高强度脉冲激光辐照薄箔片发出的X射线

在布拉格Asterix激光系统（PALS）实验室以大约10 ¹⁶  W / cm ^2的辐射，在厚度为10μm的不同靶材的靶材正常鞘层加速方式下，激光产生等离子体的X射线和正离子发射使用波长为1315 nm的激光，脉冲持续时间为300 ps，对光强进行了研究。主要使用碳化硅（SiC）检测器在飞行时间配置和X射线条纹相机成像中测量光子和离子的发射。结果表明，最大质子加速度值和X射线发射产率的增长与被辐照目标的原子序数成正比。X射线的发射不是各向同性的，能量从轻原子靶的1 keV增加到重原子靶的大约2.5 keV。激光的焦点位置会显着影响轻和重照射目标的X射线发射，