XUV中的有效透明性：原子Laser -团簇模型的泵浦-探测检验
Effective Transparency in the XUV: A Pump-Probe Test of Atomistic Laser-Cluster Models
摘要：
利用原子混合量子-经典分子动力学模型，预测了稀有气体团簇与极紫外泵浦脉冲相互作用后的有效透明性。我们发现，有一个强度范围内，一个XUV探测脉冲没有持久的影响后，被饱和的XUV泵浦脉冲的集群的平均电荷状态：集群是有效地透明的探测脉冲。这种现象发生的强度范围随团簇大小而增加，因此可以通过实验验证。我们提出的预测集群在峰值的激光脉冲轮廓，以及预期的实验飞行时间信号集成在激光轮廓。由于我们的模型只使用原子光电离率，显着的实验偏差，我们的预测将提供证据，修改电离势由于等离子体效应。
英文摘要：
The effective transparency of rare-gas clusters, post-interaction with an extreme ultraviolet (XUV) pump pulse, is predicted by using an atomistic hybrid quantum-classical molecular dynamics model. We find there is an intensity range for which an XUV probe pulse has no lasting effect on the average charge state of a cluster after being saturated by an XUV pump pulse: the cluster is effectively transparent to the probe pulse. The intensity range for which this phenomena occurs increases with cluster size, and thus is amenable to experimental verification. We present predictions for clusters at the peak of the laser pulse profile, as well as the expected experimental time-of-flight signal integrated over the laser profile. Since our model uses only atomic photoionization rates, significant experimental deviations from our predictions would provide evidence for modified ionization potentials due to plasma effects.
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