m********r
发帖数: 811 | 1 【 以下文字转载自 Physics 讨论区 】
发信人: miniplayer (mplayer), 信区: Physics
标 题: ion source
发信站: BBS 未名空间站 (Mon Aug 31 16:59:23 2009, 美东)
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+? |
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