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The range of values used in the optimization procedure for the geometrical parameters. Also, these parameters are listed in the order that they were optimized.
| Parameter | Start value | End value | Step size |
|---|---|---|---|
| Model radius (RM) [mm] | 20 | 12 | −1 |
| Anode radius (RA) [mm] | 1 | 3 | 0.1 |
| Focusing electrode angle (θ) [deg] | 0 | 10 | 1 |
| Cathode-anode distance (LCA) [mm] | 3 | 10 | 1 |
| Focusing electrode gap (GFE) [mm] | 0.1 | 1 | 0.1 |
| Anode length (LA) [mm] | 20 | … | … |
