File:Wehnelt cap.svg
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 09:42, 3 February 2017 | 460 × 600 (8 KB) | FDominec | More realistic electron beam path | |
16:04, 2 December 2011 | 460 × 600 (8 KB) | GregorDS | == {{int:filedesc}} == {{Information |Description={{en|1=A Wehnelt cap, acting as a convergent electrostatic lens to focus the cloud of electrons produced by a filament.}} |date=2011-12-02 |Source=*File:Wehnelt_cap.gif |Date=2011-12-02 16:03 (UTC) | |
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