详细论述了电磁场和永久磁场两种模式下，端部霍尔离子源的工作稳定性、离子能量大小以及离子束分布特性的比较。
Two patterns of end-Hall ion source using electromagnet coil or permanent magnet are comparatively analysed for ion energy and distribution.
永久磁铁始终保持自己的磁场——类似于冰箱门上使用的磁铁。
These magnets always have a magnetic field—akin to the magnets used to attach things to refrigerator doors.
其它物体只有在处于永久磁铁或电磁铁形成的磁场中时才具有磁性。
Other objects become magnetic only when in a magnetic field caused by a permanent magnet or an electromagnet.
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