4-6 INITIAL OPERATION
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particular ion source.
Note that the vacuum facility pump speed or other processes that take
place while the ion source is running may limit the operating range of the
ion source. A program can be saved when the Auto Controller is enabled
or when it is in standby.
When the Auto Controller is in standby, use the program select button to
select the program number that will be overwritten. Adjust the setpoints to
the desired values as described above and then press and hold the white
Acquire Setpoints button on the Auto Controller until the red program
LED stops
fl
ashing. When this LED stops
fl
ashing, the program has been
saved.
When the Auto Controller is enabled,
fi
rst select the program number
where the new setpoints will be saved. Next, adjust the setpoints to the
desired values and acquire setpoints as described above in section
4.3.1.8 Setpoint Adjustment
Repeatedly pressing and releasing the Select Program button will cycle
through the programs. If more than two seconds elapses before the
Select Program button is pressed and released, the Auto Controller will
commit to the program being viewed when it is in the enable state.
4.3.2 Gas Only Mode
When gas only mode is selected, the Auto Controller functions as a gas
controller only. Independent control of the each of the four gas channels is
possible. The description below outlines the use with one gas channel for
the ion source even though similar operation could be obtained using all
three gas channels that are available for the ion source. Gas channel 4 is
dedicated to the Hollow Cathode. Use the Operating Mode Select button
to select the Gas Only mode with the Auto Controller in standby. Selecting
the Gas Only mode releases control of the power supplies so that they can
be operated independently. There is no feedback to maintain the discharge
parameters. However, at any time during the operation in gas only mode,
the setpoints can be acquired for operation later using the Auto Gas mode
or the Manual Gas mode.
Note: In Gas Only Mode, the program LED does not
fl
ash unless a gas
set point has changed
Note that if there is no communication link to any of the power supplies, the
