INITIAL OPERATION 4-7
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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
Auto Controller will only function in the gas only mode, which must be se-
lected to clear the HLP 7 message from the display. There will be no com-
munication link if the power is switched off to any of the power supplies or
if any RS-485 cable connection on the rear panel is not connected to Auto
Controller or any of the power supplies.
There are two modes of operation for the discharge: Constant Current
Mode or Constant Voltage Mode. The Constant Current Mode allows for
small variations in the discharge voltage while maintaining a constant cur-
rent and is recommended when operating at 120 V and below. The Con-
stant Voltage Mode will allow for small variations in discharge current and
maintains a constant voltage. Constant Voltage Mode is recommended for
operation above 120 V.
4.3.2.1 Constant Current Mode
The operating condition selected for this demonstration is with a 2.5A,
120 V, discharge, which is Constant Current Mode operation. These
conditions are based on a vacuum pump speed of 800 liters per second.
Operating parameters for other pump speeds and gases can be found in
the Ion Source Manual.
Note that the operating range of the ion source may be limited by the
vacuum facility pump speed or other process that take place while the
ion source is running.
• Press the white Enable/Standby button on the Auto Controller.
• Select Gas 4 using the white Gas Channel Select button on the
Auto Controller and then turn the Gas Adjust knob to 10 sccm. Gas
should be allowed to
fl
ow through the hollow cathode for 15 minutes
at 10 sccm before proceeding to the next step
• Select Gas 1 using the white Gas Channel Select button on the Auto
Controller and then turn the Gas Adjust knob to 10 sccm.
• Select Gas 4 using the white Gas Channel Select button on the Auto
Controller and then turn the Gas Adjust knob to 100 sccm.
• Turn the knob on the Keeper Power Supply until 1.5 amps is indi-
cated in the Keeper Amps display.
• Turn the knob on the Emission Power Supply until 2.7 amps is in-
