混合式电极结构X-pinch的研究

Study on X-pinch of Hybrid Pole Structure

摘要: X-pinch作为X射线源进行背光照相，具有较高的空间分辨率和时间分辨率，可用于拍摄快速变化的过程，如丝阵负载的内爆过程。为了得到同一组丝阵负载内爆过程的多幅背光成像图片，需多个X射线源对其进行背光成像，在天光Ⅱ-B（~250 kA，50 ns）脉冲功率装置的驱动下，通过实验选择了一种混合式电极结构X-pinch。实验结果表明：此种混合式电极结构X-pinch可箍缩产生X射线，所辐射出的X射线光子能量主要在2～4 keV之间，因其固有的空间对称性及出光电流较小，可完成多路背光照相。

Abstract: The X-pinch as the source of X-ray backlighting, has higher space resolving power and time resolving power, and it can screen the process of fast change, such as the wire array implosion. For getting several X-ray backlighting photos at the same wire array implosion, it must have several X-ray sources. With Light Ⅱ-B （~250 kA, 50 ns） pulsed power generator at China Institute of Atomic Energy, the X-pinch of hybrid pole structure was developed according to experiment. The results show that the X-pinch of hybrid pole structure with conical electrodes can radiate X-rays, and the X-rays mainly consist of photons with energy about between 2 and 4 keV. Because of the space symmetry and the least current, the X-pinch of hybrid pole structure can provide backlighting of several sides.