Spatially resolved X-ray emission measurements of the residual velocity during the stagnation phase of inertial confinement fusion implosion experiments
Spatially resolved X-ray emission measurements of the residual velocity during the stagnation phase of inertial confinement fusion implosion experiments
复制标题
惯性约束聚变内爆实验停滞阶段残余速度的空间分辨 X 射线发射测量
DOI：
10.1063/1.4956468
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发表时间：
2016
影响因子：
2.2
通讯作者：
M. Edwards
中科院分区：
文献类型：
--
作者：
J. Ruby;A. Pak;J. Field;T. Ma;B. Spears;L. Benedetti;D. Bradley;L. B. Hopkins;D. Casey;T. Döppner;D. Eder;D. Fittinghoff;G. Grim;R. Hatarik;D. Hinkel;N. Izumi;J. Kilkenny;Shahab F. Khan;J. Knauer;A. Kritcher;F. Merrill;J. Moody;S. Nagel;H. Park;J. Salmonson;D. Sayre;D. Callahan;W. Hsing;O. Hurricane;P. Patel;M. Edwards
本文介绍了一种测量间接驱动惯性约束实验中滞止段剩余运动的方法。该方法从来自两个正交视线的X射线发射的空间和时间分辨图像推断速度。这项工作调查的准确性恢复空间分辨速度的X射线发射数据。一个详细的分析和数值模拟的X射线发射测量表明，这种方法的准确性增加的位移，结果从剩余速度增加。对于典型的实验配置、信噪比和X射线发射的持续时间，估计当发射速度福尔斯下降到24 μm/ns以下时，推断速度的分数误差上升到50%以上。通过将测量的参数输入到该模型中，现在能够为实验数据生成从X射线发射测量推断的剩余速度的误差估计。细节...
A technique for measuring residual motion during the stagnation phase of an indirectly driven inertial confinement experiment has been implemented. This method infers a velocity from spatially and temporally resolved images of the X-ray emission from two orthogonal lines of sight. This work investigates the accuracy of recovering spatially resolved velocities from the X-ray emission data. A detailed analytical and numerical modeling of the X-ray emission measurement shows that the accuracy of this method increases as the displacement that results from a residual velocity increase. For the typical experimental configuration, signal-to-noise ratios, and duration of X-ray emission, it is estimated that the fractional error in the inferred velocity rises above 50% as the velocity of emission falls below 24 μm/ns. By inputting measured parameters into this model, error estimates of the residual velocity as inferred from the X-ray emission measurements are now able to be generated for experimental data. Details...