Picosecond electron deflectometry of optical-field ionized plasmas
Picosecond electron deflectometry of optical-field ionized plasmas
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DOI：
10.1038/nphoton.2008.77
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发表时间：
2008-05-01
期刊：
影响因子：
35
通讯作者：
Fill, Ernst E.
中科院分区：
文献类型：
--
作者：
Centurion, Martin;Reckenthaeler, Peter;Fill, Ernst E.
光场电离等离子体因其独特的性质和适用于许多应用的事实而引起人们极大的兴趣，例如核聚变研究(1)、高能电子(2-5)和离子(6,7)的产生、X射线发射(8,9)、X射线激光(10-12)和极紫外阿秒脉冲产生(13)。详细了解等离子体动力学对于优化给定应用至关重要。在这里，我们演示了一种以超高时间分辨率对光场电离等离子体中的电场分布进行实时成像的方法，产生其他方法无法获得的信息。该技术基于电子偏转测量，产生的图像显示带正电的核心和远远超出德拜长度的电子云。
Optical-field ionized plasmas are of great interest owing to their unique properties and the fact that they suit many applications, such as the study of nuclear fusion(1), generation of energetic electrons(2-5) and ions(6,7), X-ray emission(8,9), X-ray lasers(10-12) and extreme-UV attosecond pulse generation(13). A detailed knowledge of the plasma dynamics can be critical for optimizing a given application. Here we demonstrate a method for real-time imaging of the electric-field distribution in optical-field ionized plasmas with ultrahigh temporal resolution, yielding information that is not accessible by other methods. The technique, based on electron deflectometry, yields images that reveal a positively charged core and a cloud of electrons expanding far beyond the Debye length.