Method for controlling space charge-driven ion instabilities...

Radiant energy – Ion generation – Electron bombardment type

Reexamination Certificate

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C250S42300F

Reexamination Certificate

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11114481

ABSTRACT:
In a method for inhibiting space charge-related effects in an ion source, an electron beam is directed into a chamber to produce ions from sample material in the chamber. A voltage pulse is applied to the chamber to perturb an electron space charge present in the chamber. The ion source may be an electron impact ionization (EI) apparatus. The ion source may operated in conjunction with a mass spectrometry system.

REFERENCES:
patent: 2784317 (1957-03-01), Robinson
patent: 3553452 (1971-01-01), Tiernan et al.
patent: 6294780 (2001-09-01), Wells et al.
patent: 6576897 (2003-06-01), Steiner et al.

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