In this paper, a new high power and wideband amplifier with permanent periodic magnet (PPM) focusing is presented. It consists of klystron and FEM.

提出了一种新的高功率宽带放大器，它由速调管和自由电子脉塞组成，用永久周期磁铁聚焦。

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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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Local administrators today are focusing on attainable desegregation goals, Orfield says, such as continuing magnet school and student transfer programs.

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