丝阵负载Z箍缩可见光图像诊断  

Optical image diagnostics of a wire array Z pinch

作　　者：盛亮[1] 吕敏[1] 王奎禄[2] 黑东炜[2] 邱孟通[2] 魏福利[2] 

机构地区：[1]清华大学工程物理系,北京100084 [2]西北核技术研究所,西安710024

出　　处：《清华大学学报（自然科学版）》2007年第6期851-854,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目(10035020)

摘　　要：为了研究丝阵负载Z箍缩内爆动力学行为,利用可见光图像诊断系统,在“强光1号”加速器上,得到钨丝阵负载内爆图像。对于32根丝直径为5μm的丝阵,内爆时间为（113±7）ns,开始快速内爆的时刻（ta）与内爆时间（timp）的比值为0.60~0.70。对于24根丝直径为8μm的丝阵,单丝烧蚀不均匀,在轴向上存在类周期性的调制,其波长λ约为0.25 mm;丝周围等离子体不稳定性的发展是促使其形成壳层的重要因素;内爆时间约为（160±5）ns,开始快速内爆时刻与内爆时间的比值为0.90~0.95。线质量的差异是导致两者内爆行为差异的主要因素。The implosions of 5 μm diameter 32-wire and 8 pm diameter 24-wire tungsten wire array Z pinch in ＂Qiangguang-I＂ accelerator were recorded with an optical imaging system. The images can be used to study the implosion dynamics of the wire array Z pinch. For the 32-wire array, the implosion time was （113 ± 7） ns with the ratio of the start time of the fast implosion （ta） to the implosion time （timp） of 0. 60-0.70. For the 24-wire array, the wire ablation was not uniform along the wire axis with an approximately regular modulation with the wavelength of about 0.25 mm. The interplay of the plasma between the wires is an important factor in the formation of the plasma shell For the 24-wire array, the implosion time is （160 ± 5） ns and the ta/timp is 0.90 - 0.95. The mass difference is the main reason for the different implosion behavior of the two wire arrays.

关 键 词：等离子体 丝阵负载Z箍缩 光图像诊断 内爆 

分 类 号：TL651[核科学技术—核技术及应用] O531[理学—等离子体物理]