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| Tof + voltage deflector + Einzel lens. Elements are intentially placed closer to each other to let see the finer details of the elements. |
Preface:
http://simion.com/info/grid.htmlWe want to compare the differences in electric field distortion between wire mesh plates and single-hole plates as voltage plates in our TOF mass spectrometer. The electric field can be simulated a program called Simion.
Ions accelerated by hole plates suffers a focusing effect (beam expansion):
Ions accelerated by mesh grid wires has 'less' focusing effect (trajectories are more parallel):
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| The real thing. |
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| Fine grid voltage mesh simulation, CF a hole voltage plate. |
Potential contour details showing the distortions of electric field near the fine metal wires:
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| The vertical lines are the ions coming from top. Horizontal contours are the potential energy lines. |
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| The real thing |
Simion 7 3D problems:
1. Directories in C:/Documents and settings/The One/ are not listed completely in directory tree window, even after the scan action performs. There is a warning on top of the file manage window saying "Warning, files nested too deep". Did not find a cure in the manual in the first try. Hope someone can help.
