Ci Ion Source - Agilent Technologies 5975C TAD VL MSD Troubleshooting And Maintenance Manual

7
Analyzer

CI Ion Source

The CI ion source
only has one part in common with the EI source — the entrance lens. The
single CI filament has a straight wire and a reflector. A "dummy" filament
provides connections for the other wires.
The holes in the ion source (electron-entrance and ion-exit) are very small
(0.5 mm), making it possible to pressurize the ionization chamber. Both the
source body and the plate are at repeller potential, electrically isolated from
the radiator and the CI interface tip. The seal for the interface tip ensures a
leak-tight seal and electrical isolation between the CI interface and ion source.

CI ion source

Interface tip seal
Interface tip
Interface cover
Figure 45
202
(Figure 45 and
CI ion source tip seal
5975 Series MSD Troubleshooting and Maintenance Manual
Figure 46) is similar to the EI source, but