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INITIAL OPERATION 4-11
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Copyright © 2010 by Kaufman & Robinson, Inc., 1306 Blue Spruce Drive, Unit A, Fort Collins, CO 80524
Tel: 970-495-0187, Fax: 970-484-9350, Internet: www.ionsources.com
Manual Gas mode operates the same as the auto gas mode except that
there is no feedback loop for the gas
fl
ows to maintain the anode param-
eters. This being the case, the gas channels can all be independently ad-
justed during operation, where this was not possible in the Auto Gas mode.
The discharge parameters can be set up for either constant voltage mode
operation or constant current mode operation as described above for the
manual gas operating mode.
Constant voltage mode is typically used for discharge voltages of 120 volts
or more. The discharge current is usually set to maximum, while the operat-
ing voltage is set to the desired value on the front panel. The gas
fl
ow to the
ion source is then adjusted to control the ion source current.
Constant current mode is typically used for discharge voltages less than
120 volts. The discharge voltage is usually set to maximum, while the oper-
ating current is set to the desired value on the front panel. The gas
fl
ow to
the ion source is then adjusted to control the ion source voltage.
Select the Manual Gas mode using the Operating Mode button. Select
the program to run using the Program Select button. Enable the program
by pressing the Enable/Standby button on the Auto Controller. Press the
Enable/Standby button again to stop the program and put the units into
Standby.
Saving a program is the accomplished in the same manner as described
above for the Auto Gas and Gas Only operating modes.