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    • 10. 发明授权
    • Multiple collector mass spectrometers
    • 多个收集器质谱仪
    • US4524275A
    • 1985-06-18
    • US447179
    • 1982-12-06
    • John S. CottrellPatrick J. TurnerDavid J. Kay
    • John S. CottrellPatrick J. TurnerDavid J. Kay
    • H01J49/06G01N27/62H01J49/20H01J49/26H01J49/30
    • H01J49/30
    • In a mass spectrometer, suitable for use in the determination of isotope ratios, having as a mass selector a sector magnet and detector means for detecting and measuring the intensity of ion beams at two or more positions in the focal plane of said sector magnet, the improvement comprises providing the exit (and optionally also the entrance) pole face of said sector magnet with a curvature such that the focal plane of said sector magnet lies substantially at right angles to the ion optical axis as it passes through said focal plane. With this arrangement, motion of detector means between positions in said focal plane by means of mechanical linkages controlled from outside the vacuum system of the mass spectrometer is facilitated.
    • 在用于确定同位素比率的质谱仪中,具有作为质量选择器的扇形磁体和用于检测和测量在所述扇形磁体的焦平面中的两个或更多个位置处的离子束的强度的检测器装置, 改进包括提供所述扇形磁体的出口(以及可选地还有入口)极面的曲率,使得当所述扇形磁体经过所述焦平面时,所述扇形磁体的焦平面基本上与离子光轴成直角。 利用这种布置,便于通过从质谱仪的真空系统外部控制的机械联结在所述焦平面中的位置之间的检测器装置的运动。