神光原型诊断设备:门控针孔分幅相机的研制

SG diagnostic equipment:Gating pinhole framing camera

为满足X射线针孔分幅相机在神光Ⅲ原型中的安装与正常测试,在原有分幅相机成像理论的基础上,研制了新型结构门控针孔分幅相机。设计了锥筒针孔成像系统,用于排除系统内杂散光干扰,从而在原型靶室内顺利实现小孔成像。设计了新型分幅像管结构,利用长微带结构充分改善了耦合匹配参数,利用新型荧光屏结构和装夹方式以及两块光纤面板耦合结构,实现在有限空间内成像仍为16幅。使用了屏压脉冲加电方式,使像管使用安全性能大大提高。设计了圆柱桶式真空密封结构,将相应的高压脉冲发生器和各种相机状态监测设备全部装入,并可通过PC104进行远程控制。

In order to install an X-ray Pinhole Framing Camera（X-PFC） conveniently and run smoothly in the SG3 prototype system（SG3-PS） of Inertial Confinement Fusion（ICF）,a novel type X-PFC was developed on the basis of original models and a conical barrel pinhole imaging system was desined to eliminate the stray light and to obtain the pinhole imaging in the SG3-PS.The matching parameters were evidently improved by designing a long micro-strip in new tube,which could keep the number of imagings to be still 16 frames in the limited space by using new type fluorescent screen,steady clamp method and the way of sealing up with two optics fiber plates.The save quality of new tube was improved greatly by gating pulse voltage on the screen.Furthermore,the high-voltage pulse generators and all of monitoring facilities were assembled in the cylinder barrel type vacuum seal configuration by PC104.Experiments show that all kinds of technical indexes have been upgraded when some parts of the new camera structure are redesigned and experimental results are received better.