142 5977 Series MSD Operation Manual
5 General Maintenance
To Assemble a Standard or Inert 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 Assemble the repeller assembly.
a Install the repeller block insert into the source heater block assembly.
(See Figure 24 on page 143.)
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.
2 Insert the drawout plate and the drawout cylinder into the source body.
(See Figure 24 on page 143.)
3 Assemble the ion focus lens, entrance lens, and lens insulators.
4 Slide these assembled parts into the source body.
5 Install the setscrew that holds the lenses in place.
6 Install the interface socket.
7 Attach the repeller assembly to the source body using the two gold plated
screws and spring washers.
8 Install the filaments using the two gold plated screws and spring washers.
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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