三次元電子レンズのシミュレーション

概要

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Demands for high-resolution and large-screen color cathode ray tubes lead to developing a three dimensional electron lens which is composed of asymmetrical electrodes. The design of a three dimensional lens requires computer simulation. A high-precision computer program simulating the electron trajectories of a three dimensional lens has been developed. The methods for precise calculation and the developed algorithm are presented in this paper. The equation of electron motions were integrated with Runge-Kutta method. The step sizes were adjusted by a posteriori estimation of a local truncation error. The relative truncation error during the whole integration was optimized to make a compromise between precision and CPU time. A surface charge method was chosen to calculate the electric fields. An algorithm which can avoid both the round-off errors and the singularity was developed. The simulation program was applied to a XF-type electron lens for data display. The predicted parameters of a focus electrode by simulation were proved by measurement. The developed simulation technology made it possible to design the electrodes for an electron gun with the required precision of 0.01mm.
日本シミュレーション学会の論文
1990-06-15