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为回旋管放大器设计了运用于温度限制区的磁控注入电子枪。采用一系列电子枪阳极区的计算机模型,以确定一些热特性和结构特性。计算了这些特性对电子注能量、速度分布和温度的影响。由热分析得到了137个结点的稳态温度。由于热引起的机械膨胀在轴向上为0.20％,径向上为0.82％。利用三度座标系统对373个单元的应力进行了数字测定。阴极热子的预热特性为:输入功率为9瓦时,在500秒时间内可使阴极发射体温度达到1068℃。电子发射所造成的阴极冷却效应使所需的稳态热子输入功率增加11％(对于1068℃的发射体温度)。确定了机械变形对电子注参量的影响。为了能画出电子枪阳极区的电子轨迹,采用了二维的计算机模拟方法。
A magnetron injection electron gun for temperature control zone was designed for the gyrator amplifier. A series of computer models of the anode area of the electron gun were used to determine some thermal and structural properties. The influence of these characteristics on electron energy, velocity distribution and temperature is calculated. The steady-state temperature of 137 nodes was obtained by thermal analysis. The mechanical expansion due to heat is 0.20% in the axial direction and 0.82% in the radial direction. The stress of 373 units was digitally measured using a three degree coordinate system. The cathode heater’s preheating characteristics are such that when the input power is 9 watts, the cathode emitter temperature can reach 1068 ° C in 500 seconds. The cathode cooling effect caused by the electron emission increases the required steady-state thermionic input power by 11% (for emitter temperature of 1068 ° C). The influence of mechanical deformation on the electronic parameters was confirmed. In order to draw the electronic trajectory of the anode region of the electron gun, a two-dimensional computer simulation method was used.