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用数学分析和图解相结合的方法对B—A型电离计中的电子轨迹作了详尽分析和讨论。其结论指出:电子轨迹与灯丝附近的畸变场密切相关;该畸变场愈小,电子在栅板空间的行程长度愈大,灵敏度也愈大。在选择两组不同的电极电压时,可得到两个不等的灵敏度K和K~1,而其X—射线光电流,都不会改变,从而可成功地实现了自调制。
With the combination of mathematical analysis and graphical analysis of the B-A ionization gauge in the electronic trajectory for a detailed analysis and discussion. The conclusion points out that the electron trajectory is closely related to the distortion field in the vicinity of the filament. The smaller the distortion field, the larger the stroke length of electrons in the grid space and the greater the sensitivity. When two sets of different electrode voltages are selected, two unequal sensitivities of K and K ~ 1 are obtained, and their X-ray photocurrents are not changed, so that self-modulation can be successfully achieved.