Al丝物理状态调控及对芯晕演化特性的影响

基于快直线脉冲变压器(FLTD)平台开展了数十kA电流下Al单丝芯晕演化特性研究，实验发现丝过早发生电压击穿会减少丝芯的能量沉积，而晕等离子体的迅速发展将约束丝芯的进一步膨胀，降低丝芯膨胀速度。通过调整负载两端的初始电压、丝长及增加闪络开关等手段，抑制了Al丝的过早击穿，增加了早期能量沉积，获得了不同的丝芯物理状态（部分气化或完全气化）。Al丝的气化提高了丝芯膨胀速度，最高达11~14 km/s，晕等离子体发展缓慢，延缓了边界处不稳定性的出现，降低了后期m=0的发展速度。FLTD负极性输出时，Al丝沿轴向的极性效应更加明显，靠近阴极处丝芯膨胀慢，边界处晕等离子体密度高，不稳定性的发展速度快。     

南京地铁屏蔽门控制系统简介

本文介绍了南京地铁屏蔽门控制系统,屏蔽门控制系统的组成、主要部件、控制方式.     

南京地铁屏蔽门防踏空胶条浅谈

南京地铁每条线路均设置了屏蔽门,屏蔽门门槛与列车门之间有间隙,乘客在上下车过程中容易踏空,存在很大的安全隐患,通过加装防踏空胶条缩小屏蔽门与列车门之间间隙,保护乘客安全。     

浅谈南京地铁屏蔽门电源系统

本文介绍了南京地铁屏蔽门电源系统,屏蔽门电源系统的主要构成,供电方式、功能和保护措施.     

百千安电流下的单丝Z箍缩实验研究

为更深层次理解Z箍缩基本物理过程，认识单丝早期演化对丝阵后续内爆过程产生的影响，基于百千安直线脉冲变压器（FLTD）平台开展了不同材料（钨丝、镀膜钨丝和铝丝）单丝Z箍缩实验研究，实验获得了单丝演化过程的双分幅激光阴影和干涉图像。实验发现：初始直径相同（15 μm）的条件下，铝丝核的膨胀速度比钨丝核的快，在电流开始一段时间内，铝丝核沿轴向呈均匀膨胀，而钨丝核因电极效应沿轴向膨胀不均；镀膜钨丝（15 μm W+2 μm Polyimide）核的膨胀速度远大于钨丝核的，甚至高于铝丝核的，同时镀膜还降低了消融等离子体不稳定性的发展速度。     

Experimental Study of Current Loss of Stainless Steel Magnetically Insulated Transmission Line with Current Density at MA/cm Level

A magnetically insulated transmission line （MITL） is used to transmit high power electric pulses in large pulse power systems. However, current loss is unavoidable, especially when the current density is up to 1 MA/cm. In the paper, the current loss of an MITL made of stainless steel, which is usually used in large pulse power generators, is experimentally studied, and possible mechanisms to explain the current loss of the MITL are analyzed and discussed. From the experimental results, the relationship between loss current density and input current density follows approximately a power law. The loss is also related to the configuration of the MITL.     

Primarily Experimental Results for a W Wire Array Z Pinch

Primarily experimental results are given for a W wire array Z pinch imploded with up to 2 MA in 100 ns on a Qiangguang-I pulsed power generator. The configuration and parameters of the generator, the W wire array load assembly and the diagnostic system for the experiment are described. The total X-ray energy has been obtained with a averaged power of X-ray radiation of 1.28 TW.     

用于Ｚ箍缩的双层喷气负载设计

双层喷气负载作为减小瑞利-泰勒不稳定性的重要手段,在Z箍缩实验中得到广泛应用。本文主要阐述双层喷气负载的机械设计,包括整体结构以及密封、同步等。分析了影响内外气室气密性的主要因素及弹簧参数的选取。对由线圈、铁芯及拉杆组成的拉阀系统进行了验算。结果表明,在所选参数下,系统完全满足实验要求。最终在“强光一号”加速器上进行了结构验证性实验,获得了满意的效果。     

An Experimental Study on Kr Gas-puff Z-pinch

Kr gas-puff Z-pinch experiment performed recently on Qiang-uang I pulsed power generator is reprted.The generator has a 1.5MA current with a pulse width of 100ns.The total X-ray energy as well as its spectrum has been obtained.and the average power of X-ray radiation in 50-700eV measured by XRDs is 2 TW.The generator configuration.gas-puff load assembly and diagnostic system for the experiments are described.     

Study on Performance Parameters of the Plasma Source for a Short-Conduction-Time Plasma Opening Switch

Plasma source performance parameters,including plasma ejection density and velocity,greatly affect the operation of a short-conduction-time plasma opening switch(POS).In this paper,the plasma source used in the POS of Qiangguang I generator is chosen as the study object.At first the POS working process is analyzed.The result shows that the opening performance of the POS can be improved by increasing the plasma ejection velocity and decreasing the plasma density.The influence of the cable plasma gun structure and number on the plasma ejection parameters is experimentally investigated with two charge collectors.Finally a semi-empirical model is proposed to describe the experimental phenomenon.