共查询到17条相似文献,搜索用时 343 毫秒
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单次性脉冲磁场在各种高能加速器中有着重要的应用。其磁场波形、场型分布、磁场幅度绝对值的测量已经有过报导,本文继续介绍单次性脉冲磁场幅度跳动的测量及其计算机测量系统。在系统的工作原理部分,以软件硬件相结合的方式介绍了系统的工作原理,给出了测量结果。文章最后分析了测量误差,提出了减小误差,提高测量精度的方法,给出了系统精度。 相似文献
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基于SOPC架构的脉冲磁场数据采集系统 总被引:1,自引:0,他引:1
提出了一种嵌入式高速高精度脉冲磁场数据采集系统的设计方案,基于先进SOPC技术,在FPGA中嵌入了32位Nios Ⅱ软核系统,实现脉冲磁场信号的采集、处理、存储、传输等功能.该系统具有设计灵活、数据处理速度快、精度高和扩展性好等优点. 相似文献
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介绍了在超灵敏小型回旋加速器质谱计上进行的磁场测量与磁场非电垫补工作中计算机的应用.包括磁场测量控制、磁场测量后处理、磁场激励控制和磁场非电垫补的计算及数据处理工作,并给出磁场非电垫补所达到的结果. 相似文献
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在CYCIAE-100回旋加速器的整体设计中,满足各种束流动力学要求的磁场分布的实现是最为关键的环节之一。在紧凑型回旋加速器中,磁铁的形变将严重影响中心平面及其附近的磁场分布。导致磁铁变形的主要因素有磁铁自身的重力、电磁力和外界的大气压力。其中对于重力和电磁力引起的磁铁形变,如果变形足够小,可留待磁场测量和垫补阶段处理;如果变形较大,则需在设计阶段对气隙的结构尺寸加以补偿。而对于大气压力引起的磁铁变形,由于磁场测量是在非真空条件下进行,因此需详细分析这样的变形对磁场的影响,为大气下测磁数据的真空校正处理提供依据。总之,主磁铁的结构力学研究对于CYCIAE-100最终磁场达到高的精度有重要意义。 相似文献
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介绍了基于高速虚拟示波器的脉冲磁场测量系统软件的设计方法,该设计较以前有了很大的改进,高速虚拟示波器首次应用于该领域.设计中实现了全自动数据采集,处理分析及保存.自动化取点减轻了测量的工作量,使用精密运动台增强了定位的精度.使用LabVIEW通过调用动态链接库,得到虚拟示波器采集到的信号数据,并设计了触发、幅值调节、采... 相似文献
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PENG Chengcheng GU Ming LIU Bo OUYANG Lianhua 《核技术(英文版)》2007,18(6):321-325
This paper describes the magnetic field measurement system for pulsed magnets in SSRF.The system consists of magnetic probes,analog active integrator,oscilloscope,stepper motor and a controller.An application pro- gram based on LabVIEW has been developed as main control unit.After the magnetic field mapping of a septum magnet prototype,it is verified that the test results accord with the results of theoretical calculation and computer simulation. 相似文献
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The highpower pulsed power supply system for the magnetic field of the HL-2A Tokamak is described in this paper. The total output power of its eight magnetic field power supply units of nearly 250 MW. Their highest DC output voltage and current are 3510 V and 45 kA, respectively. All the units are operated in a pulsed mode. The pulse duration is 5 s, and the cyclic period is 15 min. The power supply system consists mainly of pulsed flywheel motor generators, rectifying transformers, thyristor converters, diode rectifiers and switches. The system incorporates many key technologies-supply equalization with two generators and four diode bridges, constant-angle phase triggers with a wide frequency range, current equalization, a status detector for the high current 6-phase converter, and advanced monitoring based on a programmable logic computer and engineering parameter measurement. The experimental results show that the performance of the power supply system satisfies the requirements of HL-2A experiments very well. 相似文献
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A pulsed magnetic field generator was developed to study the effect of a magnetic field on the evolution of a laser-generated plasma.A 40 kV pulsed power system delivered a fast(~230 ns),55 kA current pulse into a single-turn coil surrounding the laser target,using a capacitor bank of 200 nF,a laser-triggered switch and a low-impedance strip transmission line.A one-dimensional uniform 7 T pulsed magnetic field was created using a Helmholtz coil pair with a 6 mm diameter.The pulsed magnetic field was controlled to take effect synchronously with a nanosecond heating laser beam,a femtosecond probing laser beam and an optical Intensified Charge Coupled Device(ICCD) detector.The preliminary experiments demonstrate bifurcation and focusing of plasma expansion in a transverse magnetic field. 相似文献
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A three-dimensional model is proposed in this paper to study the effect of the pulsed magnetic field on the density distribution of high flow velocity plasma sheath. Taking the typical parameters of plasma sheath at the height of 71 km as an example, the distribution characteristics and time evolution characteristics of plasma density in the flow field under the action of pulsed magnetic field, as well as the effect of self-electric field on the distribution of plasma density, are studied. The simulation results show that pulsed magnetic field can effectively reduce the density of plasma sheath. Meanwhile, the simulation results of three-dimensional plasma density distribution show that the size of the density reduction area is large enough to meet the communication requirements of the Global Position System(GPS) signal. Besides, the location of density reduction area provides a reference for the appropriate location of antenna. The time evolution of plasma density shows that the effective density reduction time can reach 62% of the pulse duration, and the maximum reduction of plasma density can reach 55%. Based on the simulation results, the mechanism of the interaction between pulsed magnetic field and plasma flow field is physically analyzed. Furthermore, the simulation results indicate that the density distributions of electrons and ions are consistent under the action of plasma self-electric field.However, the quasi neutral assumption of plasma in the flow field is not appropriate, because the self-electric field of plasma will weaken the effect of the pulsed magnetic field on the reduction of electron density, which cannot be ignored. The calculation results could provide useful information for the mitigation of communication blackout in hypersonic vehicles. 相似文献
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脉冲强磁体处于复杂的电磁、热、应力等多物理场共同作用下,设计中考虑的因素众多,物理关系复杂,分析过程繁琐。借助大型有限元软件分析工具ANSYS建立了70T脉冲强磁体中电磁、温度场耦合分析模型,实现了磁场与温度场的计算,并通过有限元方法实现了脉冲磁体性能的优化。实验结果表明,磁体样机达到70T磁场水平。 相似文献
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1 IntroductionSO2 is one of the main hazards to human health, andit is the main component of the acidic oxides in the at-mosphere. The menace of the acidic pollution by SO2can be curtailed if it is removed from the air. In recenttime, researchers across the world have been concernedabout efficient removal of SO2.Several techniques have been applied to decompos-ing SO2 in the air in recent years. At present, themain technologies for removing sulfur dioxide include:the gas-phase reaction [1]… 相似文献
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宽频带电光式脉冲电场测量系统的研制及应用 总被引:9,自引:1,他引:8
介绍了一种宽频带电光式脉冲电场测量系统(PEMS-1),该系统动态范围约60dB,频率响应为0.1Hz~700MHz,具有抗电磁干扰能力强、探头部分无源化、体积小等优点,可用于传统测试手段难于实现的复杂电磁环境下或小空间内的瞬变电场测量。给出了系统组成及分析,对频率响应与线性测量范围进行了实验研究,提出了一种无标准场时有效进行幅值标定的方法。最后,在两种脉冲电场环境中进行了测试应用。 相似文献