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在静电鞍场规的基础上研制了一种碳纳米管(CNT)冷阴极鞍场规(SFG)。这种冷阴极鞍场规具有电极尺寸小,吸放气率低,热效应低,功耗低的特点。本文首先计算了碳纳米管冷阴极鞍场规的电场分布,计算结果表明,二极型碳纳米管电子枪的引出栅极的正电位在低于100 V的情况下对环形阳极鞍场规的轴向电位分布影响很少;并且在现有条件下对规管参数进行了测试,实验测定的规管对空气的灵敏度是1.05 Pa-1,规管功耗由热阴极规的0.9瓦减小到7毫瓦。
A carbon nanotube cold cathode saddle (SFG) was developed based on the electrostatic field test. This cold cathode saddle field gauge has the characteristics of small electrode size, low absorption and desorption rate, low thermal effect and low power consumption. In this paper, the electric field distribution of the cold cathode saddle with carbon nanotubes is first calculated. The calculated results show that the positive potential of the withdrawn gate of the carbon nanotube electron gun is lower than 100 V, To the potential distribution has little effect; and under the existing conditions of the regulatory parameters were tested, the experimental regulation of air sensitivity is 1.05Pa-1, regulatory power consumption from 0.9 watts of hot cathode gauge reduced to 7 milliwatts.