[1]童林夙,丘木兰,许亦先.旋转对称电子发射系统的理论研究[J].东南大学学报(自然科学版),1982,12(3):164-180.[doi:10.3969/j.issn.1001-0505.1982.03.011]
 Tong Lin-su,Qiu Mu-lan,and Xu Yi-xan.Theoretical Study of Rotationally Symmetrical Electron Emission Systems[J].Journal of Southeast University (Natural Science Edition),1982,12(3):164-180.[doi:10.3969/j.issn.1001-0505.1982.03.011]
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旋转对称电子发射系统的理论研究()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
12
期数:
1982年第3期
页码:
164-180
栏目:
本刊信息
出版日期:
1982-09-20

文章信息/Info

Title:
Theoretical Study of Rotationally Symmetrical Electron Emission Systems
作者:
童林夙丘木兰许亦先
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Author(s):
Tong Lin-su Qiu Mu-lan and Xu Yi-xan
关键词:
蒙特卡洛法 发射系统 能量分布 层流枪 电流密度分布 电子束管 电子轨迹 旋转对称 交叉枪 相对误差
分类号:
+
DOI:
10.3969/j.issn.1001-0505.1982.03.011
摘要:
本文应用蒙特卡洛法研完了旋转对称电子发射系统并考虑了空间电荷和热速度效应。这种方法具有考虑全面因素特别计及电子的固有离散性质、直观模型、程序结构简单与计算精度较高等优点。以旋转对称系统为例讨论了应用蒙特卡洛法计算发射系统的主要步骤。着重讨论了如何应用随机数实现对电子的初始能量分布、方向余弦分布和方位角分布的抽样。最后给出了一些计算实例。用蒙特卡洛法计算了平面二极管并与解析解进行比较,相对误差为0.8%;与实验标准二极管实验值进行比较,相对误差为8%。还进一步计算了用于电子束管中的交叉枪和层流枪的发射系统。从电流密度和能量分布的角度对两者的优缺点进行了比较,指出在非调制情况下或电子束层流性不被破坏的调制情况下层流枪性能有较大的优越性。
Abstract:
The effects of space charge and thermal velocity are taken into account, and Monte Carlo Method (MCM) is proposed to deal with the rotationally symmetrical electron emission systems in cathode ray tubes. This method can be used with advantage for computing electron emission systems with fully considered factors especially the inherent discrete property of electron to be considered; direct view model; simple program structure, and high accuracy. It takes rotationally symmetrical system as an example to discuss the main steps for computing electron emission system by means of MCM, especially how to use random numbers to take samples from initial electron energy distribution, direct cosine and azimuthal angle is emphatically discussed. Finally, several practical computation examples are given. The planar diode is calculated by means of MCM and compared with the analytical solution. The relative error is 0.8%. In comparison with the experiment value of experimental standard diode, the relative error is 8%. Calculations are further given on the cross-over gun and laminar flow gun, and their performances are compared from the view point of current density and energy distribution. It indicates that in the case of unmodulation or modulation under which the laminarity of electron beam is not deteriorated, the laminar flow gun seems better than the cross-over sun.
更新日期/Last Update: 2013-05-01