Title:
Flight time type mass spectroscope
Document Type and Number:
Japanese Patent JP6202214
Kind Code:
B2
Abstract:
A voltage applied to an exit gate electrode forming a potential barrier and temporarily trapping ions within the inner space of the ion guide is higher than a voltage at an ion guide's exit end. A higher voltage is applied to the exit gate electrode for a lower m/z value of the measurement target ion, to push back the ion which has slowly moved along a potential gradient and reached the exit end of the ion guide. An ion having a lower m/z value is more likely to be located in a farther region from the exit end and forced to travel a longer distance when voltage applied to the exit gate electrode is lowered. A lower m/z value also means a higher travelling speed toward the orthogonal accelerator, whereby m/z dependency of the time required for travel from the ion guide to the orthogonal accelerator eventually becomes low.
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Inventors:
Daisuke Okumura
Application Number:
JP2016548486A
Publication Date:
September 27, 2017
Filing Date:
September 18, 2014
Export Citation:
Assignee:
SHIMADZU CORPORATION
International Classes:
H01J49/42; G01N27/62; H01J49/40
Domestic Patent References:
| JP2003123685A | ||||
| JP2005183022A | ||||
| JP2007536530A |
Foreign References:
| US20020030159 |
Attorney, Agent or Firm:
Kyoto International Patent Office