精锻机备件国产化改造

对精锻机关键备件的国产化从材质的选择、工艺的制订及修理进行了分析，并提出了改进方案。     

Optimization of Cavity Combination for 20 MA LTD-Based Accelerators

Based on a transmission line code,a circuit model is proposed that could serve as the basic method for the analysis of linear transformer driver (LTD)-based accelerators.By using 1MA,100kV LTD cavities,the peak load current is optimized for a total of N cavities between 500 and 1200.The simulation results suggest that,with the same number of cavities,the peak current changes obviously with the types of combinations,and the maximum change can be as large as 1.2MA.The results also show that,for the cases considered,the optimized peak current as a function of the total number of cavities agrees with the exponential associate,and the peak current for one level LTD cannot be enhanced infinitely.Furthermore,it is found that,to obtain a 20MA peak load current,at least 1029 LTD cavities (49 in series and 21 in parallel connection) are needed.Finally,the typical parameters of the optimized design are compared to those of the existing Z accelerator.     

“强光一号”脉冲γ射线辐射剂量测量及其不确定度分析

"强光一号"加速器是一台具有多种辐射状态的强脉冲辐射模拟装置,能够产生多种能量的X、γ射线,对γ射线的辐射参数的测量是判断加速器工作状态的重要手段之一。主要介绍了目前"强光一号"加速器所产生的γ射线剂量测量系统中剂量元件的筛选、标定和测量方法以及对辐射剂量测量的不确定度分析,并对剂量测量结果进行了总结。     

Dynamic Model for the Z Accelerator Vacuum Section Based on Transmission Line Code

The transmission-line-circuit model of the Z accelerator, developed originally by W. A. STYGAR, P. A. CORCORAN, et al., is revised. The revised model uses diffe...     

Simulation Analysis of Transmission-Line Impedance Transformers for Petawatt-Class Pulsed Power Accelerators

Based on the transmission line code TLCODE, a 1D circuit model for a transmission- line impedance transformer was developed and the simulation results were comp...     

基于IBIS模型的多路脉冲信号源ADS仿真

使用高速比较器+两级时钟扇出buffer+比较器输出CMOS电平方案,利用ADS的Integrity–IBIS模块,搭建了80台示波器用脉冲信号源。介绍了IBIS模型原理、语法结构及模型适用性,并进行了瞬态仿真,分析了高速比较器IC、时钟扇出IC和脉冲输出IC之间的差分信号完整性,对最终输出信号的延迟和抖动进行了计算。仿真结果表明：使用高速比较器+两级时钟扇出buffer+比较器输出CMOS电平方案可获得80路同步触发信号;输入输出信号延迟<2.6ns,抖动<11ps,50Ω负载时输出信号幅值1.97V,前沿997ps,满足多路示波器外触发信号要求。     

用于Z箍缩诊断装置的快阀研制

Z箍缩实验滞止后期负载产生的微小碎片及其他飞溅物质会污染Z箍缩诊断系统内的光学器件,本文研制了一种基于电磁感应原理的快阀,其可用于遮断微小碎片及其他飞溅物质。根据能量守恒和电路方程,计算了快阀的运动速度、遮断时间及线圈放电电流等参数,并利用实验测量获得快阀运动速度为19 m/s,遮断时刻时间抖动为85 μs,实验测量与计算结果较为吻合。     

双平行电极场畸变气体火花开关电极优化与实验研究

为适应新型低电感电容,笔者优化设计了应用于电缆绕组型直线脉冲变压器的新型双平行电极场畸变气体火花开关。对触发电极处于主放电通道和未处于主放电通道的两种电极结构进行了仿真模拟,通过模拟发现不同触发电极位置对开关电场分布无明显影响。分别对触发电极不同位置的场畸变火花开关进行实验,开展了不同电极结构的静态耐压、触发延迟实验。实验数据表明,触发电极处于主放电通道上时,开关的静态特性和触发特性较好。