Abstract
Recent progress in the improvement of mass spectrometers at Osaka University is presented. Mass spectrometers are designed by using the computer program TRIO, which calculates the ion trajectories in the third order approximation. Several high-performance mass spectrometers are proposed and some of them have been constructed and examined. Two different kinds are described in detail: one is a single focusing mass spectrometer with large incident and exit angles and the other is a double focusing mass spectrometer with field arrangement QQHQC (quadrupole, quadrupole, homogeneous magnetic sector, quadrupole, cylindrical electric sector). High resolution and high sensitivity are attained simultaneously.
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