| 摘要 |
PROBLEM TO BE SOLVED: To provide a flight time type mass spectrometry device which can cut off at this side of an ion reserve much of ions originating in a carrier gas that are introduced in a large quantity from a gas chromatograph device and ionized in a large quantity at an ion source. SOLUTION: The electron bombarded ion source comprises a source magnet that deflects a part of generated ions from the center axis direction of the ion reserve, and at the rear stage of the electron bombarded ion source, an electrostatic lens that further assists the deflection of ion by the source magnet and a differential discharge slit for cutting off the deflected ion are provided. COPYRIGHT: (C)2005,JPO&NCIPI
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