Resonance method for production of intense low-impurity ion...

Details Resonance method for production of intense low-impurity ion... Resonance method for production of intense low-impurity ion...

2008-04-29

2008-04-29

Wells, Nikita (Department: 2881)

Radiant energy

Ion generation

Methods

C250S425000, C250S42300F

Reexamination Certificate

active

07365340

ABSTRACT:
The present invention comprehends a compact and economical apparatus for producing high intensities of a wide variety of wanted positive and negative molecular and atomic ion beams that have been previously impossible to previously produce at useful intensities. In addition, the invention provides a substantial rejection of companion background ions that are frequently simultaneously emitted with the wanted ions. The principle underlying the present invention is resonance ionization-transfer where energy differences between resonant and non-resonant processes are exploited to enhance or attenuate particular charge-changing processes. This new source technique is relevant to the fields of Accelerator Mass Spectroscopy; Molecular Ion Implantation; Generation of Directed Neutral Beams; and Production of Electrons required for Ion Beam Neutralization within magnetic fields. An example having commercial importance is ionization of the decaborane molecule, B10H14where an almost perfect ionization resonance match occurs between decaborane molecules and arsenic atoms.

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