共查询到20条相似文献,搜索用时 46 毫秒
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用等效电路法探讨了电子枪栅控脉冲板的短脉冲输出波形及幅度,并给出与关晶体管数量间的关系。依此研制成功的脉冲板满足了中国科学技术大学国家同步辐射实验室200MeV电子直线加速器的要求,该设备几年来一直稳定工作。 相似文献
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利用现有强流负氢离子源实验台架,充分考虑现有注入线和中心区的设计,建立强流脉冲化实验装置,将几十至百keV量级的强流束进行脉冲化,将70MHz(中心实验台架10MeV紧凑式回旋加速器的高频频率)连续波负氢束脉冲化为重复频率1~8MHz,脉冲宽度约为10ns。 相似文献
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驻波型电子直线加速器采用鉴相式技术实现加速管、磁控管的频率跟踪控制。当加速器出束运行时,加速管、磁控管的温度发生变化,导致二者的频率变化,必须对磁控管进行频率调整,若频率差太大,导致功率不能很好馈入加速管,甚至造成全反射,长时间可能会损坏磁控管等设备。改 相似文献
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50kV,1ns前沿高压脉冲源的研制 总被引:2,自引:1,他引:1
介绍了50kV,1ns前沿高压脉冲源的工作原理及设计部件的研制,给出了脉冲高压源的输出波形,该高压脉冲源与有界波电磁脉冲模拟器辐照天线相接,可在其工作空间内产生前沿为1.2ns,脉宽为50ns的电磁环境,用于电子系统的电磁脉冲效应研究。 相似文献
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The nanosecond(ns) pulsed nitrogen dielectric barrier discharge(DBD) is employed to enhance the hydrophilicity of polypropylene(PP) surface and improve its application effect. The discharge characteristics of the ns pulsed nitrogen DBD with different pulse rise times(from 50to 500 ns) are investigated by electrical and optical diagnostic methods and the discharge uniformity is quantitatively analyzed by image processing method. To characterize the surface hydrophilicity, the water contact angle(... 相似文献
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The effect of air pressure (12.5, 25, 50, and 100 kPa) on the generation of runaway electron beams in a non-uniform electric field when applying voltage pulses (≈35 kV) with a rise time of ≈200 ns has been studied. The results show that the discharge has various stages: streamer, diffuse, and spark. Initially, a wide streamer develops in the gap and a diffuse discharge is formed. A spark is formed ≈100 ns after the breakdown. The current pulse of a supershort avalanche electron beam (SAEB) was measured with a collector at various pressures of air. Experiments show that there are two modes of generation of runaway electrons. At an air pressure of 25–100 kPa, a single SAEB current pulse with a full width at half-maximum (FWHM) of 120–140 ps is observed. At the air pressure of 12.5 kPa, two current pulses of the electron beam are observed. FWHM of the first and second current pulses are ≈140 ps and ≈300 ps, respectively. The current pulse amplitude of the second electron beam is higher than that of the first one, but the electron energy is less. 相似文献
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介绍了一种多路高压测试系统,并简要介绍了电路结构和电路设计、工作原理和技术指标。该仪器主要用于实验室和野外直流单路高压和多路高压系统电压值的测试,特别是对探测器偏压的测试。该仪器可以测量的额定电压最大值为6kV,电流值为0.1-10mA。仪器结构简单、集成度高、交直流供电、体积小、携带方便。 相似文献
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高压偏移栅PMOSFET击穿电压的电离辐照响应 总被引:1,自引:0,他引:1
揭示了辐照引起击穿电压变化的机制,提出了提高高压偏移栅PMOSFET击穿电压抗电离辐照的方法。对辐照后击穿电压退火特性进行了研究。 相似文献
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双能X射线骨密度仪中的高压控制是利用计算机串口通信,通过8098单片机系统对中频高压系统(20kHz)进行控制,使用了10位模数-数模转换装置。其AD取样通道为4个,DA控制通道为4个。 相似文献
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As a flexible auxiliary heating method,the electron cyclotron resonance heating(ECRH) has been widely used in many tokamaks and also will be applied for the J-TEXT tokamak.To meet requirements of protection and fault analysis for the ECRH system on J-TEXT,signals of gyrotrons such as the cathode voltage and current,the anode voltage and current,etc should be transmitted to the control and data acquisition system.Considering the high voltage environment of gyrotrons,isolation transmission module based on FPGA and optical fiber communication has been designed and tested.The test results indicate that the designed module has strong anti-noise ability,low error rate and high transmission speed.The delay of the module is no more than 5 μs which can fulfill the requirements. 相似文献