GENERAL DESCRIPTION AND SPECIFICATIONS 2-3
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er Supply provides a negative voltage to the hollow cathode after it is ignited
by the Keeper Power Supply and controls the electron current emitted from the
HCES. This power supply communicates to the Auto Controller through a RS-
485 interface.
Additional information can be found in the individual manual for the Keeper
Power Supply.
2.4 Discharge Power Supply
The Discharge Power Supply is designed to be installed in a standard 19 inch
rack mount cabinet and is shown in
fi
gures 2-1 and 2-2 along with the Auto
Controller and the Keeper and Discharge power supplies. The Discharge Pow-
er Supply provides voltage and current to the anode of the End-Hall ion source.
This power supply communicates to the Auto Controller through a RS-485 in-
terface.
Additional information can be found in the individual manual for the Discharge
Power Supply.
2.5 Mass Flow Controller(s)
The mass
fl
ow controller (MFC) or controllers are supplied when ordered as
a complete system. The controllers are connected to the gas feed for the ion
sources as close as possible to the gas feedthrough on the vacuum system.
Up to four mass
fl
ow controllers can be attached to the Auto Controller. The gas
fl
ows can be set as a constant ratio or they can be set independently.
The Auto Controller can be used with a variety of mass
fl
ow controllers. How-
ever, the cables may vary depending on the mass
fl
ow controller provided in
the order. The pin descriptions for the female DB-15 connectors on the back of
the Auto Controller are given below in table 2-2.
