130
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Important: Do not abrasively or
ultrasonically clean the insulators.
5975/5973 MSD Electron Impact Ion Source Parts (EI)
Item Description Part No. Inert
Part No.
1 Ion source body G1099-20130 G2589-20043
2 Drawout plate, 3 mm 05971-20134 G2589-20100
3 Drawout cylinder G1072-20008 G1072-20008
4 Lens insulator G3170-20530 G3170-20530
5 Ion focus lens 05971-20143 05971-20143
6 Entrance lens G3170-20126 G3170-20126
7 Cap screw, gold plated G1999-20021 G1999-20021
8 High temperature filament G2590-60053 G2590-60053
9 Transfer line socket G1099-20136 G1099-20136
10 Repeller insulator G1099-20133 G1099-20133
11 Repeller G1099-20132 G2589-20044
The recommended cleaning material for the EI ion source is abrasive powder, aluminum
oxide powder.
Do not immerse filaments or lens
insulators in solvent. If insulators
are dirty, clean them with a cotton
swab dampened with reagent-
grade methanol. If that does not
clean the insulators, replace them.
Abrasively clean the surfaces that contact the sample or ion beam. Use an abrasive slurry
of alumina powder and reagent-grade methanol on a cotton swab. Use enough force to
remove all discolorations. Polishing the parts is not necessary; small scratches will not
harm performance. Also abrasively clean the discolorations where electrons from the
filaments enter the source body.
Take care to avoid contaminating
cleaned and dried parts. Put on
new, clean gloves before handling
the parts. Do not set the cleaned
parts on a dirty surface. Set them
only on clean, lint-free cloths.
Electron Impact (EI) Ion Source
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