Z箍缩等离子体K壳层X射线自辐射单色成像

K-shell emission monochromatic X-ray imaging of Z-pinch plasmas

采用针孔配接对数螺线柱面晶体方案,研制了一种小型、靶室内置X射线单色成像器,用于获取Z箍缩等离子体K壳层自辐射单色图像。在阳加速器上对该成像器进行了测试,成功地获取了铝丝阵负载Z箍缩等离子体K壳层自辐射的类氢线与类氦线单色图像。实验结果表明:该成像器具有优异的单色性(能谱带宽小于1eV),适合于中低原子序数Z箍缩内爆负载的特征谱线单色图像诊断。

An in-chamber,mini X-ray imager employing a pinhole and a logarithmic spiral crystal has been manufactured to obtain the K-shell emission monochromatic X-ray images.The imager was tested on the ＂Yang＂ accelerator and successfully obtained the hydrogenlike line and heliumlike line images of the imploding Al wire array.The results show that the imager has excellent monochromacity（the energy band width is less than 1 eV） and is very suitable for acquiring the characteristic X-ray emission images of the medium or low Z imploding Z-pinch loads.