LW3-10型SF_6断路器圆筒电极制作新工艺

分析了LW3—10型断路器圆筒电极的新旧制造工艺。结果表明，采用粉末冶金新工艺制造的整体电触头材料，具有省工省时、结合强度好、外形美观等诸多优点。

圆筒电极抑制换热表面CaCO_(3)污垢沉积特性研究

将一圆筒柱面电极布置在换热器入口管道处,并与高压电源正极连接,研究圆筒电极形成的非匀强电场对实验段换热表面CaCO_(3)污垢沉积的影响。作为对比,同时分析了平行板电极(匀强电场)作用下CaCO_(3)污垢沉积行为。结果表明,施加平行电极与圆筒电极均可抑制换热表面CaCO_(3)污垢的沉积,抑垢率随施加电压(0~5000 V)的增加呈现先升高后降低的变化趋势。当施加平行电极时,最佳抑垢电压值为1000 V,最佳抑垢率为73.27%。当施加圆筒电极时,最佳抑垢电压为500 V,最佳抑垢率为83%。因此,施加圆筒电极具有更好的抑垢效果,同时最佳抑垢电压更低,可降低电的消耗。此外,在无电场作用时,换热表面CaCO_(3)晶体主要为树枝状文石结构,当施加圆筒或平行电极时,CaCO_(3)晶体主要为块状方解石结构。

S波段大功率行波管电子枪设计

采用皮尔斯电子枪综合法设计,并在综合法设计中引入圆筒电极聚焦和双阳极设置概念,再通过Egun数值模拟、优化,方便、快速设计出了S波段大功率螺旋线行波管高导流系数、大电流、高电流密度电子注电子枪,该电子枪成功加工装配在行波管整管中。

A Modified Cold Molybdenum Cathode Penning Ion Source

In this paper, design and construction of a modified cold molybdenum cathode Penning ion source was described. It consists of copper cylindrical anode with two cone ends and two movable cold molybdenum cathodes. The two cathodes were placed symmetrically at two ends of the anode. The modifications were decrease the length of the cylindrical anode to 4 cm instead of 6 cm, transform the copper emission electrode shape from plate of 40 mm length, 25 mm width and 2 mm thickness to disc of 20 mm diameter and 2 mm thickness and transform the inner uncovered area of the emission electrode from slit of 30 mm length and 10 mm width to disc of 5 mm diameter. The copper emission electrode was placed in the middle of the cylindrical anode and has aperture in the center of different diameters. Faraday cup was placed at different distances from the emission electrode aperture. The electrical discharge and the output ion beam characteristics of the modified ion source were measured at different pressures using argon gas. It was found that the optimum operating conditions of the modified ion source are; anode-cathode distance equal to 6 mm, emission electrode aperture diameter equal to 2.5 mm and emission electrode aperture, Faraday cup distance equals 3 cm. The effect of axial samarium cobalt permanent magnet of intensity equal to 300 Gauss on the discharge characteristics of the ion source was determined.