5 - 4
6. Remove the Wehnelt as well as the cartridge filament. By pulling the Wehnelt, it can be
removed together with the cartridge filament.
NOTE : When handling the components inside the electron gun (the cap, the Wehnelt, the
anode, and the cartridge filament), use clean gloves to keep them free of particles
and smudges.
Figure 5.1-6 Removing the Wehnelt and
the Cartridge Filament
Figure 5.1-7 Wehnelt and Cartridge
Filament
7. Remove the Wehnelt from the cartridge filament by turning it counterclockwise.
Figure 5.1-8 Removing the Wehnelt (1) Figure 5.1-9 Removing the Wehnelt (2)
8. Clean the removed Wehnelt.
Clean the Wehnelt every time the filament is replaced.
Wehnelt and Cartridge filament
Wehnelt Cartridge filament
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