Method and apparatus for improved focusing of ion currents in qu

Details Method and apparatus for improved focusing of ion currents in qu Method and apparatus for improved focusing of ion currents in qu

1974-12-10

1976-02-03

Church, Craig E.

Radiant energy

Ionic separation or analysis

250292, H01J 3934

Patent

active

039366340

ABSTRACT:
Application of dc potentials of values other than ground to materials which appear as conductors to dc and low frequency ac electric fields and as dielectrics to high frequency ac electric fields in order to compensate for changes of potential due to ion and electron currents reaching the material and/or to provide for improved focusing of the ions, particularly with large ion currents, into a quadrupole mass filter.

REFERENCES:
patent: 3129327 (1964-04-01), Brubaker
patent: 3617736 (1971-11-01), Barnett
patent: 3867632 (1975-02-01), Fete

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