| CPC H01J 49/408 (2013.01) [H01J 49/24 (2013.01)] | 3 Claims |
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1. A mass spectrometer, comprising:
a vacuum container including a first chamber and a second chamber each of which is configured to be internally evacuated, as well as an opening through which the first chamber and the second chamber communicate with each other, wherein the opening is formed in a plate partitioning between the first chamber and the second chamber;
an ion trap including a plurality of electrodes arranged within the first chamber, the ion trap having an ion introduction port for introducing ions into an ion-capturing space which is a space surrounded by the plurality of electrodes and an ion ejection port for ejecting ions from the ion-capturing space;
a gas introduction tube for introducing a cooling gas into the ion-capturing space;
an ion trap holder located within the first chamber and configured to hold the ion trap within an ion-trap-holding space surrounded by a wall, the ion trap holder having following ports formed in the wall: an introduction-side ion passage port connected to the ion introduction port; an ejection-side ion passage port located between the ion ejection port and the opening; and a cooling-gas discharge port provided apart from the introduction-side ion passage port and the ejection-side ion passage port, wherein the wall is connected to the plate by a pillar and the ejection-side ion passage port continues into the opening through the pillar; and
a time-of-flight mass spectrometer located within the second chamber, the time-of-flight mass spectrometer including a flight space in which ions ejected from the ion ejection port into the second chamber through the ejection-side ion passage port and the opening are made to fly, and a detector configured to detect ions which completed a flight in the flight space.
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