Ion source control system
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United States of America Patent
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Mar 3, 2009
Grant Date -
Apr 26, 2007
app pub date -
Aug 13, 2004
filing date -
Oct 31, 2003
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A gridless ion source operates from a control system (201) that generates an anode voltage (215) comprising a mains rectified signal such that the anode voltage modulates between a first voltage above a threshold and a second voltage below the threshold. The mains rectified signal is provided by transformer (210) receiving a mains input (211). The output of the transformer (213) is rectified by a bridge rectifier (214). In preferred embodiments, the threshold is an ionization threshold such that the ion current is initiated and extinguished in every cycle.
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