摘要
在Angara-5-1联合实验中,利用条纹像机和光纤阵列实现时间分辨和1维空间分辨,得到了丝阵条纹像,观察到丝阵负载箍缩区X光辐射的1维轴向空间分布信息随时间的演化过程,考察了内爆的同步性和均匀性。通过对比不同结构负载内爆等离子体X光1维时空分布信息,发现由于内层等离子体对磁流体瑞利-泰勒不稳定性的抑制作用,(40+20)根双层钨丝阵比60根单层钨丝阵的内爆轴向同步性好,产生的X光辐射功率高;由于负载存在弯曲、断丝、扭曲等现象,(60+30)根双层钨丝阵比90根单层钨丝阵的轴向同步优势不明显;轴向同步性好与辐射功率高之间存在相关性;辐射波形前沿较快时,X光功率较高。
A time-space-resolved 1-D X-ray imaging system is developed to investigate the X-ray power distribution with one-dimensional space and continuous time resolution in Z-pinch experiments performed on Angara-5-1 facility. A slit relays the 1- D image of the pinch to a scintillator which converts X-ray to visible light, and the image is subsequently relayed to the cathode of an optical streak camera via an optical fiber array, optical fiber bundles and a lens and finally the time resolved 1-D X-ray distribution is obtained. As the inner plasma reduced the R-T instability of the implosion, the （40＋20） double tungsten array implosion had a better axial implosion uniformity and synchronization than the 40 single tungsten array implosion, as well as the higher peak radiated X-ray power. Axial implosion synchronization in implosions of （60 ＋30） double tungsten array was nearly the same in case of 90 single tungsten array because of the bending, distorting and breaking of the loads. For specific facility, current and wire array configuration, higher X-ray radiation power corresponds to better axial uniformity and synchronization of implosion and faster rise time. Analysis indicates that better axial implosion synchronization corresponds to higher X-ray power, and faster rise time of the local X-ray pulse corresponds to higher radiation power.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2007年第11期1822-1826,共5页
High Power Laser and Particle Beams
基金
国家自然科学基金重点资助课题(10035030)
关键词
Z箍缩
丝阵
时空分辨
X光辐射诊断
功率分布
等离子体
Z-pinch
Wire array
Time-space-resolved
X-ray radiation diagnoses
Power distribution
Plasma
