Timing the release in sequential double ionization
Timing the release in sequential double ionization
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DOI：
10.1038/nphys1946
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发表时间：
2011-05
期刊：
影响因子：
19.6
通讯作者：
A. N. Pfeiffer;C. Cirelli;M. Smolarski;R. Dörner;U. Keller
中科院分区：
文献类型：
--
作者：
A. N. Pfeiffer;C. Cirelli;M. Smolarski;R. Dörner;U. Keller
强场双电离中电子释放的时间对概念定义和实验测量都提出了很大的挑战。在这里，我们提出了符合动量测量的双电荷离子和两个电子所产生的双电离氩使用椭圆偏振激光脉冲。基于一个半经典模型，电离时间计算从测量的电子动量在一个大的强度范围。本文讨论了这种方法如何提供粗略和精细的计时，类似于时钟的时针和分针。我们发现，第一个电子的电离时间是在很好的协议与模拟，而第二个电子的电离发生显着早于预测。
The timing of electron release in strong-field double ionization poses great challenges both for conceptual definition and for conducting experimental measurements. Here we present coincidence momentum measurements of the doubly charged ion and of the two electrons arising from double ionization of argon using elliptically polarized laser pulses. Based on a semi-classical model, the ionization times are calculated from the measured electron momenta across a large intensity range. This paper discusses how this method provides timings on a coarse and on a fine scale, similar to the hour and the minute hand of a clock. We found that the ionization time of the first electron is in good agreement with the simulation, whereas the ionization of the second electron occurs significantly earlier than predicted.