Thermo Scientific DSQ II, Hardware Manual

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5
Ion Source and Inlet Valve
Ion Source
170 DSQ II Hardware Manual Thermo Scientific
Ion Source
During operation, the ion source holds an ion volume in its center. It is aligned by the ion
volume key thumbscrew and secured by the ball plunger. Samples are introduced from a GC
through the transfer line into the sample inlet aperture located on the side of the ion source.
Calibration compound and chemical ionization reagent gas also enter the ion volume through
the transfer line.
The ion source board supplies voltages to the filament, electron lens, and cartridge heaters, as
it passes signals from the temperature sensor. Three base studs hold the ion source board to
the ion source. These studs slip into the magnet yoke and position the ion source between two
permanent magnets.
Three cartridge heaters and a temperature sensor are mounted on the ion source board.
Cartridge heaters pass through and heat the ion source, as well as heat, align, and support the
three ion source lenses. The temperature sensor monitors the temperature of the ion source.
The heater ring slips over the cartridge heaters and transfers heat to the lenses.