Optical probing of high intensity laser interaction with micron-sized cryogenic hydrogen jets
Optical probing of high intensity laser interaction with micron-sized cryogenic hydrogen jets
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DOI：
10.1088/1361-6587/aabf4f
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发表时间：
2018-05
影响因子：
2.2
通讯作者：
T. Ziegler;M. Rehwald;L. Obst;C. Bernert;F. Brack;C. Curry;M. Gauthier;S. Glenzer;S. Göde;L. Kazak;S. Kraft;M. Kuntzsch;M. Loeser;J. Metzkes-Ng;C. Rödel;H. Schlenvoigt;U. Schramm;M. Siebold;J. Tiggesbäumker;S. Wolter;K. Zeil
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文献类型：
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作者：
T. Ziegler;M. Rehwald;L. Obst;C. Bernert;F. Brack;C. Curry;M. Gauthier;S. Glenzer;S. Göde;L. Kazak;S. Kraft;M. Kuntzsch;M. Loeser;J. Metzkes-Ng;C. Rödel;H. Schlenvoigt;U. Schramm;M. Siebold;J. Tiggesbäumker;S. Wolter;K. Zeil
探测激光驱动等离子体相互作用中等离子体演化的快速动力学提供了对激光驱动离子加速背景下实验的更深入理解，并促进了与补充数值研究的相互作用。除了所涉及的微观尺度之外，强等离子体（自）发射（主要围绕驱动激光的谐波）通常使数据分析复杂化。我们提出了独立探测激光系统的概念和实现，该系统在时间上与驱动激光同步，提供超出驱动激光谐波的探测波长。该系统的能力显示在一个全面的激光质子加速实验中使用可再生的低温氢射流目标。为了进一步改进，我们研究了探头颜色、探头观察角度和驱动激光的时间对比度对探头图像质量的影响。
Probing the rapid dynamics of plasma evolution in laser-driven plasma interactions provides deeper understanding of experiments in the context of laser-driven ion acceleration and facilitates the interplay with complementing numerical investigations. Besides the microscopic scales involved, strong plasma (self-)emission, predominantly around the harmonics of the driver laser, often complicates the data analysis. We present the concept and the implementation of a stand-alone probe laser system that is temporally synchronized to the driver laser, providing probing wavelengths beyond the harmonics of the driver laser. The capability of this system is shown during a full-scale laser proton acceleration experiment using renewable cryogenic hydrogen jet targets. For further improvements, we studied the influence of probe color, observation angle of the probe and temporal contrast of the driver laser on the probe image quality.