X射线相衬成像应用于惯性约束核聚变多层球壳靶丸检测

随着惯性约束核聚变(ICF)研究的逐步深入,尤其是氘氚(DT)燃料层球壳梯度掺杂的广泛应用,对轻物质界面的诊断需求日益增长.在北京同步辐射形貌成像站的微米CT机上利用类同轴相衬成像方法获取了三层球壳靶丸的相衬图像,最佳空间分辨率达到了2μupm,衬度达到12%;通过分析边缘增强函数和衬度传递函数之间的关系,总结出一套完整的类同轴相衬成像方法,同时将相衬成像结果与吸收成像结果对比.实验结果表明,X射线相衬成像在轻物质界面的分辨中具有明显的优势,能够广泛应用于ICF研究、医学断层扫描CT装置和生物结构等前沿科学领域.

The application of phase contrast imaging to ICF multi-shell capsule diagnosis

With the development of the research on inertial confinement fusion(ICF),there is needed a diagnostic technique for low Z materials.The phase contrast imaging,which relies on gradients in the refractive index and wave interference,is proposed to characterize the typical ICF(inertial confinement fusion) capsule shell.In our work it is indicated that the phase contrast imaging obtained with a micro-focus X-ray source provides complementary information about the capsule shell with high resolution 2μm,and has advantages of absorb imaging.Such a capsule shell diagnostic technique is very useful for ICF diagnoses.Besides,we propose an approach to obtaining of the optimum contrast and spatial resolution in phase contrast imaging.It is a guidance in obtaining an excellent result in phase contrast imaging experiment,and can be widely used in biomedicine,materials science.