The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 28, 2018
Filed:
Jan. 25, 2011
Motohide Yasuno, Kyoto, JP;
Motohide Yasuno, Kyoto, JP;
Shimadzu Co., Kyoto, JP;
Abstract
A technique for improving the efficiency of injecting ions into the electrode unit of a funnel structure having high ion-transport efficiency is provided to improve the overall ion-transport efficiency. From an ionization chamberfor ionizing a sample under atmospheric pressure, ions are injected through a straight capillary pipeinto the inner space of the electrode unitof a funnel structure composed of ring electrodes in a first intermediate vacuum chamber. The space for setting the capillary pipeis formed by replacing one or more ring electrodes with C-shaped electrodes whose circumference portion is partially removed. Each C-shaped electrode is arranged so that the ions will be injected perpendicularly to the ion-transport direction. The injected ions lose energy due to collision cooling, become converged onto the ion-beam axis C due to the ion-confining effect of a radio-frequency electric field, and efficiently move toward the exit aperture along a potential gradient created by a direct-current electric field. The gas stream carrying the ions passes through the gaps of the ring electrodes, without increasing the gas pressure at the exit of the ring-electrode inner space and thereby deteriorating the degree of vacuum in the next stage.