CAJ | 학술논문

利用PPG-Ⅰ脉冲功率装置(500 kV,400 kA,100 ns)驱动X箍缩负载,得到了μm量级的亚纳秒脉冲X射线辐射点源.在阴阳极轴线和回流柱上同时安装X箍缩负载,前者可作为背光照相的X射线点源;后者可作为被拍照的目标X箍缩.获得了X箍缩发展过程不同时刻的时间序列图像,在背光照相的图像中可以清晰观察到X箍缩交叉点处等离子体的外爆、箍缩以及最终的崩溃阶段.将阴阳极轴线上的X箍缩负载用Z箍缩丝阵负载代替,实现了对丝阵负载Z箍缩放电起始阶段的X射线背光照相,观察到了最初的各单丝电爆炸、等离子体膨胀及融合过程,同时观察到了双丝Z箍缩发展过程中的等离子体不稳定性.实验结果有助于深入理解Z箍缩发展的物理过程,同时可为有效的模拟建模分析提供基本的实验数据.
이용PPG-Ⅰ맥충공솔장치(500 kV,400 kA,100 ns)구동X고축부재,득도료μm량급적아납초맥충X사선복사점원.재음양겁축선화회류주상동시안장X고축부재,전자가작위배광조상적X사선점원;후자가작위피박조적목표X고축.획득료X고축발전과정불동시각적시간서렬도상,재배광조상적도상중가이청석관찰도X고축교차점처등리자체적외폭、고축이급최종적붕궤계단.장음양겁축선상적X고축부재용Z고축사진부재대체,실현료대사진부재Z고축방전기시계단적X사선배광조상,관찰도료최초적각단사전폭작、등리자체팽창급융합과정,동시관찰도료쌍사Z고축발전과정중적등리자체불은정성.실험결과유조우심입리해Z고축발전적물리과정,동시가위유효적모의건모분석제공기본적실험수거.
A pulsed power generator (PPG-Ⅰ) with a voltage of 500 kV in amplitude, a current of 400 kA in amplitude and 100 ns in pulse width was constructed. The development of X-pinches and the early stages of wire-array Z-pinches were investigated by X-ray backlighting using the X-pinch driven by PPG-Ⅰ as X-ray source. The plasma explosion and implosion near the cross point of the X-shaped wires can be clearly seen from a series of backlighting images taken at different time during X-pinch discharge. To study the early behavior of the plasma in wire-array Z-pinches, an X-pinch installed in the place of a current-return rod was used as the X-ray source to backlight a wire-array Z-pinch installed in the center between the anode and the cathode. The plasma formation, the inter-wire plasma merging, and the instabilities were also clearly observed, which can provide a better understanding of the physics of Z-pinches and the basic experimental data to validate simulation models.