共查询到19条相似文献,搜索用时 312 毫秒
1.
2.
回旋行波管对回旋电子注参数(纵横速度比、速度零散等)非常敏感,实验中需进行电子参数调节,高质量电子枪研制是整管设计核心之一。基于理论分析、结构分析及热分析等对回旋行波管电子枪进行改进设计,对阴极、热子进行优化设计,研发的电子枪速度零散<2%,优于国际报道的3%。项目在热分析和形变分析基础上,改进了阴极结构及制备工艺,显著提高了热子加热效率,将阴极加热功率从100W降低至50W左右,提升了阴极发射的均匀性和稳定性,10%工作比下长时间工作稳定、可靠,有效保障了阴极寿命,新研电子枪在Ka频段回旋行波管装管实验,脉冲功率100kW,平均功率10kW,连续工作稳定、可靠。 相似文献
3.
电子枪聚焦性能是由电极结构决定的。本文通过计算机模拟的方式对三种典型的用于大屏幕彩色显像管电子枪的光点形貌进行了系统模拟。对各电子枪聚焦特性进行的分析和比较表明电子束形成区、主透镜结构对屏蔽中心、角部的着屏光点及不同电流下聚焦的稳定性都有较大的影响。 相似文献
4.
功率行波管栅控电子枪振动模态特性与结构可靠性 总被引:1,自引:4,他引:1
介绍了功率行波管栅控电子枪的实际结构和振动考核要求,分析了电子枪的自由振动模型,并根据试验模态数据,分析了电子枪的模态频率及振型对枪体结构可靠性的影响。 相似文献
5.
6.
磁控注入电子枪可以产生具有角向旋转速度分量的电子束,是回旋管的核心部件之一,其性能优劣直接决定了整管的系统性能。本文首先分析了两种典型的磁控注入电子枪结构,根据28 GHz回旋管互作用腔束-波互作用工作需求,设计了一种双阳极结构的电子枪。三维粒子仿真设计结果表明,在阴极电压40 kV、调制阳极电压18.2 kV、电流3.2 A的条件下,引导中心半径为3.2 mm,横纵速度比为1.5,横向速度离散达到了1.06%。与此同时,所设计的电子枪具有较大的工作区间,在横纵速度比为1.9时,横纵速度比离散依旧能够达到不高于5%的要求。 相似文献
7.
本文描述了阴极射线管所用的一种新型电子枪结构,同时就其它电子枪,即传统设计的电子枪和近来高性能电子枪类型作了比较。 相似文献
8.
9.
10.
设计了采用新型曲线阴极结构的W波段双阳极磁控注入电子枪,手动优化得到的电子注参数在速度比1.1时,纵向速度零散为1.84%.为了克服手动优化方法的繁琐和低效,引入了数值计算方法的优化策略,编制了基于MATLAB语言的遗传算法和模拟退火算法的优化程序,并结合二维电子光学软件EGUN对该W波段曲线阴极结构电子枪进行优化,优化得到的电子枪在保证电子注速度比1.1的情况下,纵向速度零散分别达到了0.81%和1.05%.与手动优化方法相比,数值优化方法不需要设计者干预优化过程,具有自动高效的特点,且优化结果更好. 相似文献
11.
Jin J. Choi 《Journal of Infrared, Millimeter and Terahertz Waves》1999,20(2):239-252
A single-anode magnetron-injection-gun which will be employed to high power (61.5kV, 2amps) gyro-amplifier experiments is designed. Analytic equations based on adiabatic theory and angular momentum conservation are used to examine initial design parameters such as cathode angle, beam emitting surface radius, and anode-cathode gap. A final beam optics optimization is carried out by the use of an electron trajectory code. A beam rms spread of axial velocity, Δv z/v z, obtained from the ray tracing code is observed to be 3.7% at α = 1.37. Cathode surface roughness and thermal spreads result in increasing the beam velocity spread to 4.2%. 相似文献
12.
该文研究了和/差波束干涉SAR/GMTI技术在通道不平衡条件下地杂波对消问题.文中阐述了和/差波束干涉SAR/GMTI的原理,推导了理想条件下地杂波空域对消因子.实际系统中,由于存在通道幅相不一致等误差,直接空域对消并不能有效抑制地杂波.该文研究了基于信号子空间处理的和/差波束干涉SAR/GMTI方案,通过二维信号子空间处理自适应地校正通道误差,进而对地杂波进行空域对消.仿真实验表明该方案对系统误差的敏感度显著下降,具有很好的鲁棒性,更适合于工程实施. 相似文献
13.
Udaybir Singh Nitin Kumar L. P. Purohit Ashok K. Sinha 《Journal of Infrared, Millimeter and Terahertz Waves》2010,31(7):878-883
A 40 A double-anode magnetron injection gun for a 1 MW, 110 GHz gyrotron has been designed. The preliminary design has been
obtained by using some trade-off equations. The electron beam analysis has been performed by using the commercially available
code EGUN and the in-house developed code MIGANS. The operating mode of the gyrotron is TE22,6 and it is operated in the fundamental harmonic. The electron beam with a low transverse velocity spread (db ^max = 2.26% \delta {\beta_{ \bot \max }} = 2.26\% ) and the transverse-to-axial velocity ratio of the electron beam (α) = 1.37 is obtained. The simulated results of the MIG
obtained with the EGUN code have been validated with another trajectory code TRAK. The results on the design output parameters
obtained by both the codes are in good agreement. The sensitivity analysis has been carried out by changing the different
gun parameters to decide the fabrication tolerance. 相似文献
14.
Analytic tradeoff equations based on adiabatic assumptions are used to explore feasible design regions for single-anode magnetron injection guns (MIGs). Particle simulations are then used to optimize a single-anode and a double-anode design for a 1-μs, 500-kV, 600-A MIG which is required for a second-harmonic gyroklystron. The advantages and disadvantages of each configuration are critically examined 相似文献
15.
Shou-Xi Xu Chao-Hai Du Pu-Kun Liu 《Journal of Infrared, Millimeter and Terahertz Waves》2010,31(5):574-584
A Ka-band gyrotron traveling wave (gyro-TWT) amplifier with high power and wide bandwidth operated in the fundamental TE11
circular mode is presented in detail. The stability of the gyro-TWT amplifier using linear and nonlinear theory is analyzed.
The distributed loss technique is employed in the interaction circuit which guarantees the amplifier zero-drive stability.
The effects of the parameters such as input power, driver frequency, magnetic field on the performance of the gyro-TWT is
discussed. The simulation results show that the gain and the bandwidth of the designed Ka-band gyro-TWT are about 60.0 dB
and 1.4 GHz at constant drive with an axial velocity spread
Dvz \mathord