Mass spectrometer and method of driving ion guide
US9324551B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 25, 2014 |
| Grant date | Apr 26, 2016 |
| Priority date | — |
| Expiry date | Aug 25, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/022
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of operating an electrode changeover switch which switches the connection state of electrodes, the electrode changeover switch is provided in the wiring path between eight electrodes through, arranged rotation-symmetrically about ion optical axis, and voltage generation switch which generates square wave high voltage ±V. When switch is switched as shown in the drawing, two circumferentially adjacent rod electrodes are connected to form one set, a square wave voltage of opposite phase is applied to circumferentially adjacent sets, and an effectively quadrupole electric field is formed. When switch is switched, a square wave voltage of opposite phase is applied to circumferentially adjacent rod electrodes and an octupole electric field is formed. In this way, by switching the switch according to the mass range, etc., it becomes possible to rapidly switch the number of poles of a multipole electric field and to suitably transport ions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.