m********r
发帖数: 811 | 1 这次彻底不知道说的什么了。。。
For an ion source, the maximum half-angle of ion emission from the source is
18 milliradians. The source is biased to 10.5 kV and the aperture radius is
2 mm. Assuming uniform emission of the aperture and uniform distribution of
particles over this range, what is the normalized emmitance from the source
if the beam consist of ions 40 Ar 9+? |
|
