Measurement of heating laser injection time to imploded core plasma by using x-ray framing camera.
Measurement of heating laser injection time to imploded core plasma by using x-ray framing camera.
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DOI：
10.1063/1.2968105
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发表时间：
2008-10
期刊：
影响因子：
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通讯作者：
M. Koga;T. Fujiwara;T. Sakaiya;Myongdok Lee;K. Shigemori;H. Shiraga;H. Azechi
中科院分区：
文献类型：
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作者：
M. Koga;T. Fujiwara;T. Sakaiya;Myongdok Lee;K. Shigemori;H. Shiraga;H. Azechi
利用X射线分幅相机（XFC）对堆芯内爆等离子体和加热激光注入时间进行了同步测量。实验采用GekkoXII激光系统对氘代聚苯乙烯（CD）塑料壳靶进行内爆，用PW激光系统加热。在XFC图像中观察到PW激光注入的时间作为亮区。测量的X射线强度分布很好地拟合高斯分布。利用倍增电极模型对微通道板的计算定性地解释了这些展宽的时间分布。拟合的X射线强度分布的峰值位置与X射线条纹相机观测到高能X射线的时间基本一致。此外，峰值位置对应于PW激光注入时间的延迟设置而延迟。从这些结果可以得出结论，我们可以估计加热激光注入时间与分辨率的数量级为10 ps的XFC。
A simultaneous measurement of imploded core plasma and injection time of heating laser is conducted by using an x-ray framing camera (XFC). The experiments are performed using Gekko XII laser system for implosion of the deuterated polystyrene (CD) plastic shell target and Peta Watt (PW) laser system for heating. The time of PW laser injection is observed as the bright zone in the XFC image. The measured x-ray intensity profiles fit the Gaussian profiles well. The calculations of microchannel plate by using dynode model explain these broadened temporal profiles qualitatively. The peak position of fitted x-ray intensity profile is almost in agreement with the time when the high energy x ray is observed by x-ray streak camera. Moreover, the peak position is delayed corresponding to the delayed setting of PW laser injection time. From these results, it is concluded that we can estimate the heating laser injection time with resolution of the order of 10 ps by using XFC.