6
Maintenance
Replacing the Filament of the TSQ Quantum GC Ion Source
Thermo Scientific
TSQ Quantum XLS and TSQ Quantum GC User Guide
105
c.
Align the filament leads with the EI/CI Source PCB connectors and gently press the
leads into the connectors. Normally, there is a small gap (about 0.016 in.) between
the filament and the connectors. The gap allows the ceramic centering ring to
properly position and align the electron lens hole with the ion volume.
d. Secure the filament and centering ring with the retainer clip.
10. Press the heater ring and lens assemblies onto the cartridge heaters on the ion source
block.
11. Use the retainer clip and threaded standoff to secure the lens assemblies to the ion source.
12. Reinstall the ion source onto the magnet yoke.
13. Reinstall the ion source into the vacuum manifold. See
.
Restart the system. See
“Starting Up the System after a Complete Shutdown”
.
Replacing the Filament of the TSQ Quantum GC Ion Source
The number of ions produced in the ion source is approximately proportional to the filament
emission current. If ion production is lacking, you might have to replace the filament. If the
measured emission current is substantially less than the value that the emission current is set
to, or if the measured emission current decreases over time, then the filament has failed or is
failing and requires replacement.
See
on page
for the location of the ion source
components.To replace the ion source filament
1. Prepare a clean work area by covering the area with lint-free cloth.
IMPORTANT
For accurate temperature readings of the heater block, fully screw the
threaded standoff into the ion source to ensure contact between the temperature
sensor with the heater block.
Tools Needed
• Filament (P/N 120320-0030)
• Gloves, cleanroom grade (P/N 23827-0008 and 23827-0009)
• Lint-free cloth
Frequency
If filament fails
