Ion funnel with improved ion screening

Details Ion funnel with improved ion screening Ion funnel with improved ion screening

2006-06-20

2006-06-20

Wells, Nikita (Department: 2881)

Radiant energy

Ionic separation or analysis

With evacuation or sealing means

C250S293000, C250S489000, C250S281000, C250S288000

Reexamination Certificate

active

07064321

ABSTRACT:
An ion funnel screen ions from a gas stream flowing into a differential pump stage of a mass spectrometer, transfers them to a subsequent differential pump stage. The ion funnel uses apertured diaphragms between which gas escapes easily. Holders for the apertured diaphragms are also provided that offer little resistance to the escaping gas while, at the same time, serving to feed the RF and DC voltages.

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DE Search Report, Dec. 17, 2003.

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