钮扣电极优化设计

对于直线感应加速器的束位置探测，钮扣电极这种电容耦合型探测器是一种新的束流诊断手段。本文介绍了钮扣电极的工作原理，以及在研究这种探测器能否应用于直线感应加速器过程中，它的最初设计和根据实验结果对设计进行的改进。改进后的设计基本能够正确反映束流波形并且对束位置的测量精度达到亚毫米量级，在实验中得到了较理想的结果，证明钮扣电极可以用于电子直线感应加速器的强脉冲束位置探测。     

一种常压放电等离子体产生研究脉冲高压电源

常压下采用脉冲激励产生等离子体。方波脉冲电源可调节电压幅值、重复频率及脉冲宽度。重频高压窄脉冲调制器其输出波形和电压幅值受脉冲变压器漏磁电感和分布电容、等待充电回路、直流高压电源脉冲电容等参数的影响,采用电路仿真软件对其进行仿真计算,得到最高输出电压80 kV~90 kV,脉宽230 ns,脉冲前沿124 ns,脉冲重复频率可实现单次和130 Hz~1 kHz连续可调,重复频率脉冲幅值抖动在5%~10%。     

脉冲常压空气等离子体转动温度的光谱诊断

Dielectric barrier discharge(DBD) attracts lots of attentions for its great application promises,and the rotational temperature is one of its mostly important parameters.In order to measure the rotational temperature of a pulsed DBD in atmospheric air,the temperature is studied by using optical emission spectroscopy(OES).The discharge is excited by a high voltage pulse with 124 ns rise time and 230 ns full width at half maximum(FWHM) at a repetition rate of a few hundred hertz.The rotational temperatures are studied using different voltages,different repetition rates of the pulse power supply,and different gaps between dielectrics: They are in the range from 390 K to 500 K during the whole discharge.When the gap between dielectrics increases,the rotational temperature initially decreases and then increases.The rotational temperature changes complexly when the pulse repetition rate changes.When the voltage increases,the rotational temperature always decreases,which is not expected.These results allow one to predict the rotational temperature at different supply power parameters and electrode configurations,which is useful for the DBD’s industrial application.     

高速分幅相机在强流脉冲电子束调试中的应用研究

高能强流脉冲电子束的束参数测量是加速器研制及调试中必不可少的一部分,它对测量设备的要求极高,必须具有高的时间分辨能力、较高的抗干扰能力及较高的灵敏度等性能。为了满足这种要求,研制了一种新的高性能超高速的三分幅相机。该分幅相机采用一种成像质量较好的会聚光成像的全口径分光原理,再结合高速的图像增强器、科学CCD相机及大规模集成电路等技术,使其具有了快门时间和幅间时间独立控制的能力,灵活的控制方式很好地满足了调试中的各种测试要求,并且在有效像面面积达到Φ25mm的情况下可以获得约3 ns的最高快门速度以及好于35 lp/mm的像面空间分辨率,圆满地完成了强流脉冲电子束的调试工作。     

可编程序控制器在压缩机联锁系统中的应用

可编程序控制器在压缩机联锁系统中的应用王长生、谢宇彤（河北省石家庄化肥厂仪表车间石家庄市０５００４１）１概述设备概况：我厂原为中型化肥企业的老厂，经多年的挖潜改造和扩建，现为肥化并举的大二企业。就氨生产系统分Ⅰ、Ⅱ、Ⅲ期，合成压缩系统现有十台压缩机。...     

时变透镜设计理论研究

时变透镜是针对猝发多脉冲直线感应加速器(LIA)聚焦后的焦斑一致性调节问题所提出的新型装置。本文提出了时变透镜的2种设计方案,并且用PIC方法模拟了束流经过时变透镜的聚焦过程。通过与常规磁透镜的聚焦效果相对比,验证时变透镜对束流的焦距和焦斑半径具有一定的调节作用,从理论上证明了时变透镜方案的可行性。最后提出了设计中遇到的问题,从而确定了进一步的研究工作。     

大气压下高压亚微秒脉冲激励产生的介质阻挡放电的实验分析(英文)

An experimental device is used to study the characteristics of dielectric barrier discharge(DBD)plasma excited by high voltage sub-microsecond pulse power in atmospheric air.Glass,polytetrafluoroethene(PTFE)and plexiglass are used as dielectric barrier materials.Comparatively homogeneous discharge is obtained within 130 mm diameter area in atmospheric air using the three dielectric materials with gap distances of 4.5 mm,6.5 mm and 6.5 mm,respectively.There is no filamentary discharge observed by naked eyes or by camera with the exposure time of 0.25 s.Gas gap voltage,discharge current,discharge power density,etc.are calculated by using Liu’s equivalent circuit model for pulsed DBD.These parameters are used to study the DBD characteristics.Typically,current varies from tens of amperes to hundreds of amperes in atmospheric air DBD excited by sub-microsecond pulses.The peak power can reach to MW order of magnitude.The average power surface density of 1.0 W/cm2and the average electron density of 1011cm 3can also be obtained in the discharge.Rotational and vibrational temperatures,approximately 400 K and 2 650 K,respectively,are obtained by using the emission spectrum of the discharge.This is the basic work performed for a better understanding of the characteristics of atmospheric air DBD plasma excited by high voltage sub-microsecond pulsed power source.     

谈谈对仪表工的培训

谈谈对仪表工的培训石家庄化肥厂仪表车间（０５００４１）王长生谢宇彤化工企业都离不开各种各样的化工测量仪表，而要使这些测量仪表开好、用好、维护保养好，则需一个良好的仪表工队伍。在化工企业中，仪表工是技术性很强的工种，起着不可忽视的重要作用。所以，要造就...