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1. (WO2018016408) MASS SPECTROMETER

Pub. No.:    WO/2018/016408    International Application No.:    PCT/JP2017/025505
Publication Date: Fri Jan 26 00:59:59 CET 2018 International Filing Date: Fri Jul 14 01:59:59 CEST 2017
IPC: H01J 49/42
G01N 27/62
Applicants: HITACHI HIGH-TECHNOLOGIES CORPORATION
株式会社日立ハイテクノロジーズ
Inventors: YOSHINARI Kiyomi
吉成 清美
TERUI Yasushi
照井 康
Title: MASS SPECTROMETER
Abstract:
A mass spectrometer: is provided with a quadrupole electrode system (41) constituted from four rod-shaped electrodes (41a - 41d) disposed parallel to each other on a virtual cylinder, and first and second auxiliary electrode systems (42, 43) constituted from a plurality of rod-shaped electrodes (42a - 42d, 43a - 43d) disposed in correspondence with the respective rod-shaped electrodes (41a - 41d) constituting the quadrupole electrode system (41) at the ends of the quadrupole electrode system (41); and is constituted such that the ratio of the size of the amplitude of high-frequency voltage applied to the quadrupole electrode system (41) to the radius of the virtual inscribed cylinder for the quadrupole electrode system (41) is greater than the ratio of the size of the amplitude of the high-frequency voltage applied to the auxiliary electrode systems (42, 43) to the radius of the virtual inscribed cylinder for the auxiliary electrode systems (42, 43). Thus, the size of the device can be reduced while inhibiting reductions in resolution.