| 摘要 |
A mass spectrometer with a magnet structure including a plurality of magnetic flux sources disposed along a common axis. The plurality of magnetic flux sources includes at least one permanent magnet flux source having at least one through-hole body along the common axis. The plurality of magnetic sources generates a resultant magnetic field. A direction of a magnetic field component of the resultant magnetic field along the common axis is at least once reversed along the common axis within the magnet structure.
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