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通过改变头部电极的局部形状来改善头部电场,运用Poisson程序计算几种可能形状下表面电场的分布,并以此给出最佳的改进方案.
By changing the local shape of the head electrode to improve the head electric field, using Poisson program to calculate the distribution of electric field under several possible shapes and to give the best improvement.