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PIPS II Owners Manual and Users Guide
NOTE:
When loading a cross-sectional specimen, it is important to insert the
specimen such that the cross-sectional interface (glue line) is parallel to the
front panel (home position). This procedure ensures that the polishing sectors
will be ±30° normal to the glue line during operation of the Beam Modulator.
It is also important to note that the specimen will automatically rotate to this
home position before the piston will rise into the Airlock.
The default sector size is ±30°. This can be changed for all samples on the
Options tab, or for specific samples by using a custom recipe.
3.11.1.
Ion-Beam Modulation Selection
This panel enables selection of single- or double-sector mode:
Single Modulation:
The system is operating in the single-sector mode. This
activates each gun during the polishing sector when the front of the specimen
post is facing that gun. The stage rotates at the milling speed during the
polishing sectors and at 12 rpm between the polishing sectors to reduce total
specimen-preparation time.
Dual Modulation:
The system is operating in the double-sector mode. This
activates each gun during the polishing sector when the front and rear of the
specimen post is facing the gun. The stage rotates at the milling speed during
the polishing sectors, and at 12 rpm between sectors.
No Modulation:
Beam modulation is disabled and there is continuous
milling.
Stationary Left:
The stage does not rotate, and the left gun is on
continuously. The right gun is off. The desired stage rotation position must be
set prior to pressing Start.
Stationary Right:
The stage does not rotate, and the right gun is on
continuously. The left gun is off. The desired stage rotation position must be
set prior to pressing Start.
Custom Modulation:
This feature allows the user to define the start and stop
angles for up to two custom defined sectors. This can be useful for cleaning
up FIB samples that are mounted on the side of a grid-bar, where you may
want front and rear sectors that are asymmetric. The angle entries are the stage
angles when the guns should turn on and off. Positive angle entries must be
used.
