General Maintenance 4
5975/5977 Series MSD Operation Manual 113
To Assemble the Extractor EI Ion Source
Materials needed
• Gloves, clean, lint-free
• Large (8650-0030)
• Small (8650-0029)
• Hex ball driver, 1.5 mm (8710-1570)
• Hex ball driver, 2.0 mm (8710-1804)
• Wrench, open-end, 10 mm (8710-2353)
Procedure
1 Slide the ceramic washer into the source body.
2 Insert the extractor lens into the source body, flat side first (See Figure 17
on page 114).
3 Insert the entrance lens and ion focus lens into the insulator in the order
shown (Figure 17 on page 114).
4 Slide the insulator containing the ion focus and entrance lens into the
source body, with the ion focus lens against the extractor lens (See
Figure 17 on page 114).
5 Install the two gold plated setscrews that holds the lenses in place.
6 Assemble the repeller assembly.
a Install the repeller block insert into the source heater block assembly.
(See Figure 16 on page 111.)
b Install the repeller insulators into the source heater block assembly and
repeller block insert.
c Install the repeller through the repeller insulators, then put the flat
washer followed by the belleville spring washer onto the end of the
repeller shaft and secure finger tight with the repeller nut.
CAUTION
Do not overtighten the repeller nut or the ceramic repeller insulators will break when
the source heats up. The nut should only be finger tight.
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