A radio frequency ion guide enveloped in a DC potential field

The invention consists in embedding systems, made from one or more straight or curved rods to which a single or multiphase radio frequency voltage is applied, in an external DC potential. With the combination of the ion-repelling radio-frequency pseudo field around the rod/rods, and the external dc...

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Bibliographic Details
Main Authors JOCHEN FRANZEN, ANDREAS BREKENFELD
Format Patent
LanguageEnglish
Published 10.12.2003
Edition7
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
ELECTRICITY
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Summary:The invention consists in embedding systems, made from one or more straight or curved rods to which a single or multiphase radio frequency voltage is applied, in an external DC potential. With the combination of the ion-repelling radio-frequency pseudo field around the rod/rods, and the external dc voltage field, whose strength or penetration into the interior of the rod system varies along the longitudinal axis of the system, ions can be collected or propelled along said axis. The RF rod system may comprise a single rod 1, a multipole rod system (figure 3) or a helical rod system (figure 4). The enveloping DC field may be generated by a tube-shaped electrode 16, which may conical, cylindrical (figures 5 and 8), square-shaped (figure 6), or in the form of a trumpet. It may also be generated by an DC grid electrode surrounding the RF rod/rods (figure 11).
Bibliography:Application Number: GB20020028455