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PIPS II Owners Manual and Users Guide
4.
Clean and lubricate the O-ring and the bearing surface on the outside
of the ion-source assembly.
Dust parts off using clean compressed air or nitrogen gas to remove any dust,
lint or metallic whiskers that are the primary cause of shorting in the gun.
Squeeze and push up from both sides with thumb and index finger to remove
the O-ring from the ion source. Clean, apply vacuum grease (Krytox), and
replace. Apply vacuum grease to the curved Rulon bearing that captures the o-
ring. If this surface and the o-ring are not lubricated, then the beam alignment
will not move freely. Also apply vacuum grease to the curved surface of the
toggle stick, which mates with the drive screws in the gun knob. This helps
the toggle stick slide freely against the drive screws.
5.
Clean the gun housing O-rings.
Remove the two O-rings from the gun housing and thoroughly clean all
surfaces with freon or methanol, including the O-ring grooves.
Replace O-rings, if necessary.
Dry off all surfaces and parts with compressed air or freon gas.
To Reassemble the Gun
1.
Insert the anode cup into the anode cup insulator.
2.
Insert the anode assembly into the magnet.
Be sure the top of the anode is at the north face of the magnet.
3.
Replace the front pole piece.
4.
Carefully place the magnet assembly against the edge of the rear
polepiece.
Slowly lower the magnet assembly in place until the rear polepiece is within
the magnet shield. Properly assembled, the parts will be perfectly concentric
to one another.
5.
Place a light film of vacuum grease around the inside surface (first
one centimeter) of the port for the ion source.
6.
Slip the ion source into the gun housing.
Pay particular attention that the O-ring is not damaged in the process.
7.
Align ion source in the housing.
