提出了一种对内爆靶丸X射线轫致谱重建的方法。该方法的目的是通过重建内爆靶丸的轫致辐射谱, 得到内爆靶丸有价值的信息。这种方法将轫致谱能段分为五个部分, 假设每个部分的平均能量强度相等, 用一种包含了五个不同滤片组的多能段针孔相机对同一个内爆靶丸进行成像, 并且用IP板进行接收。五组不同的像可以给出五个不同的线形方程组, 这样就可以还原出轫致辐射谱。使用该方法还原了在神光Ⅲ原型装置上内爆靶丸的轫致辐射谱, 并据此给出了内爆热斑的温度, 所得的结果与用示踪元素特征谱线给出的温度符合得较好, 证实该方法和结果是可靠的。

This article presents a technique to restore X-ray bremsstrahlung spectrum. Through restoring the bremsstrahlung spectrum of the imploded capsule, we can obtain the information of the pellet. Assuming the energy density in each energy band is equal, we divided the energy range into 5 parts, and with a specially-made multi-pinhole camera and an algebraic transformation, we recorded images of the hot-spots. The images were produced on the imaging plate. In this way, five different linear equations were obtained and through this equation group, we could restore the spectrum. This approach was applied to hot-spot bremsstrahlung spectrum reconstruction of Shenguang Ⅲ prototype Facility. Based on the spectrum reconstruction, we deduced the temperature of the hot-spot, which is in line with the result obtained from the characteristic spectral line of the tracer element.