共查询到19条相似文献,搜索用时 157 毫秒
1.
2.
3.
1.自动白平衡调整的特点由解码电路输出的三基色R、G、B经过三个独立的视频放大器后,施加在三个独立电子枪的阴极,调制三束电子流,会聚并轰击各自的荧光粉,当三束独立的电子流相等时,混合应显示白色,但是由于三个放大器的元器件特性、电子枪阴极发射电子的能力、荧光粉的发光效 相似文献
4.
动手设计电路之前,我们先对核心器件——辉光放电数码管做了一些了解。我们知道,辉光放电数码管是利用带有一定电压的电极在惰性气体中通过阴极产生辉光放电发光的原理进行数字显示的。有点类似我们常用的试电笔中发光的氖灯泡。 相似文献
5.
6.
探讨了使用浸渍式阴极电子枪的清洗方法,通过试验采用了与原来氧化物阴极电子枪清洗的不同方法,从而改善了使用浸渍式阴极电子枪的发现与寄生发射等性能,并提出了彩管的品质。 相似文献
7.
本文利用ANSYS软件对空间行波管的电子枪进行了稳态热分析,得到了电子枪阴极温度随灯丝功率的变化结果,计算结果与试验结果一致,验证了ANSYS热分析的正确性。在此基础上分析了阴极的热形变对电子枪性能参数的影响,同时模拟了电子枪中阴极的冷启动情况,得出阴极在-35℃条件下,在210s内阴极温度可以达到正常工作温度980℃。 相似文献
8.
多孔硅(Porous Silicon,PS)平面阴极的场发射电子能量高、发散角小、对真空度不敏感、响应快,尤其适合用作场发射显示的电子源,基于PS阴极的无放电气体激发发光也为新型环保的高效平面光源技术带来了希望。本文介绍了PS阴极的电子发射原理及其研究进展,展望了其在显示技术、无放电气体激发发光技术、金属线沉积、电子束刻蚀以及其他领域的应用前景。 相似文献
9.
10.
本文介绍了对用于空间行波管的M型阴极进行的寿命试验。阴极寿命试验的载体选用普通玻璃二极管与电子枪,用于试验的M型阴极在40支普通玻璃二极管中的累计试验时间已经超过681000 h,在16支电子枪和2支行波管中的累计试验时间已经超过275000 h。对阴极的钡蒸发测量表明在空间行波管的工作年限内,M阴极主要受到膜层退化的影响,而一般不会出现钡耗尽的问题。因此基于电子枪寿命试验的数据,由膜层退化导致的阴极实际功函数增加,得出了M型阴极寿命模型,并对一定工作条件下的阴极寿命时间进行推算。同时作者发现:对于长期的阴极寿命试验,普通玻璃二极管不能有效保持其内部真空度,阴极发射下降较快;在电子枪中,阴极发射稳定。电子枪更适合作为阴极寿命试验的载体。 相似文献
11.
Wenkai Xie Xiaoyun Li Lin Meng Yang Yan Xinyan Gao Shuo Chen Shenggang Liu 《Journal of Infrared, Millimeter and Terahertz Waves》2002,23(8):1149-1158
The high-power microwave devices with plasma-filled have been unique properties. One of the major problems associated with plasma-filled microwave sources is that ions from the plasma drift toward the gun regions of the tube. This bombardment is particularly dangerous for the gun,where high-energy ion impacts can damage The cathode surface and degrade its electron emission capabilities. One of the techniques investigated to mitigate this issue is to replace the material cathode with plasma cathode. A unique plasma cathode electron gun are investigated in detail experimentally in this paper. The PCE-gun has been operated at pulser voltage up to 8KV,discharge current up to 166A,and pulse lengths of up to 60μs. 相似文献
12.
Xiaowei Gu Lin Meng Yiqin Sun Xinhua Yu 《Journal of Infrared, Millimeter and Terahertz Waves》2008,29(11):1032-1037
The high-power microwave devices with plasma-filled have unique properties. One of the major problems associated with plasma-filled microwave sources is that ions from the plasma drift toward the gun regions of the tube. This bombardment is particularly dangerous for the gun, where high-energy ion impacts can damage the cathode surface and degrade its electron emission capabilities. One of the techniques investigated to mitigate this issue is to replace the material cathode with plasma cathode. Now, we study the novel electron gun (E-gun) that can be suitable for high power microwave device applications, adopting two forms of discharge channel, 1: a single hole channel, the structure can produce a solid electron beam; 2: porous holes channel, the structure can generate multiple electronic injection which is similar to the annular electron beam. 相似文献
13.
本文从结构、材料、工艺方法等几个方面阐述了电子枪设计制造工艺过程,根据工作实践分析了电子枪设计与阴极性能的关系。 相似文献
14.
15.
《Electron Devices, IEEE Transactions on》1962,9(1):1-11
The space-charge flow solutions described by Kino and others in connection with the crossed-field carcinotron gun can be generalized to form the basis of a magnetron-injection gun design suitable for the production of hollow electron beams. In the first part of the paper this generalization is described. From the resulting flow it is possible to determine by an approximate method the electrodes to produce a gun of desired perveance with nearly uniform current density at the cathode. This technique has been used to design guns having ratios of cathode length to a diameter considerably greater than unity. The close agreement between the results obtained on several experimental guns and the theoretical predictions is described, along with the effect of departures from the prescribed fields given by the design method. 相似文献
16.
利用理论分析和仿真模拟相结合的方法对带状电子注的产生进行了系统的研究,并提出了一种带状注电子枪的设计方法.首先通过理论分析,提出了一种计算带状注电子枪结构参数的迭代算法,即根据注电压、注电流、电子注注腰处半厚度、阴极半厚度和阴极宽度,计算出带状注电子枪的阴极柱面半径、阴阳极间距、阳极柱面半径和射程等主要参数;在此基础上,通过仿真模拟,为毫米波真空电子器件设计了一种带状注电子枪. 相似文献
17.
Niraj Kumar U. N. Pal D. K. Verma J. Prajapati M. Kumar B. L. Meena M. S. Tyagi V. Srivastava 《Journal of Infrared, Millimeter and Terahertz Waves》2011,32(12):1415-1423
The pseudospark (PS) discharge has been shown to be a promising source of high brightness, high intensity electron beam pulses.
The PS discharge sourced electron beam has potential applications in plasma filled microwave sources where normal material
cathode cannot be used. Analysis of the electron beam profile has been done experimentally for different applied voltages.
The investigation has been carried out at different axial and radial location inside the drift space in argon atmosphere.
This paper represents experimentally found axial and radial variation of the beam current inside the drift tube of PS discharge
based plasma cathode electron (PCE) gun. With the help of current density estimation the focusing and defocusing point of
electron beam in axial direction can be analyzed. 相似文献
18.
本文给出了一种无截获栅糊控电子枪模型。阴影栅被直接嵌镶在阴极面上,阴影栅采用环形椰网,在计算机辅助设计中提出了简化二维数学模型并建立了计算程序。通过对计算机计算结果的分析,提出了设计这种枪的方法。并通过设计一个导流系数为0.9P的栅控枪进行了实验验证。初步结果表明建立的计算机程序完全可以满足这一类无截获栅栅控电子枪的工程设计要求。 相似文献