High reliability, long lifetime, negative ion source
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United States of America Patent
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Dec 19, 2017
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N/A
app pub date -
Jun 26, 2014
filing date -
Jul 9, 2013
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Abstract
A negative ion source includes a plasma chamber, a microwave source, a negative ion converter, a magnetic filter and a beam formation mechanism. The plasma chamber contains gas to be ionized. The microwave source transmits microwaves to the plasma chamber to ionize the gas into atomic species including hyperthermal neutral atoms. The negative ion converter converts the hyperthermal neutral atoms to negative ions. The magnetic filter reduces a temperature of electrons provided between the plasma chamber and the negative ion converter. The beam formation mechanism extracts the negative ions.
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