A double focusing, non spatial dispersion magnet design has been suggested to substitute the achromatic principle for improving the beam characteristics on target of the medical accelerator.

本文提出以双聚焦、无空间色散的设计原则，来代替常用的全消色差设计原则，使医用电子直线加速器的偏转磁铁能够具有更好的特性。

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The phase-adjusted focusing laser accelerator requires a laser field with special polarized distribution------a radial polarization.

调相聚焦激光加速原理要求激光场具有一种特殊的偏振分布——径向偏振分布。

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Sufficient and necessary conditions of stability in terms of eigenvalues of the transfer matrix are given for the motion of a charged particle in a strong-focusing accelerator.

本文对强聚焦加速器中带电粒子运动的稳定性乃至一般的N维周期性线性系统的稳定性给出用转移矩阵的特征值表示的稳定性充分必要条件。

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