Improvements in or relating to multiple collector

专利名称：Improvements in or relating to multiple

collector mass spectrometers

发明人：Cottrell, John Stanley,Turner, Patrick

James,Kay, David John

申请号：EP82306491.0申请日：19821206公开号：EP0081371B1公开日：19880511

摘要：In a mass spectrometer, suitable for use in the determination of isotope ratios,having as a mass selector a sector magnet (3) and detector means (18,9,19) for detectingand measuring the intensity of ion beams (15,16,17) at two or more positions in the focalplane of said sector magnet (3), the improvement comprises providing the exit (13) (andoptionally also the entrance (14)) pole face of said sector magnet (3) with a curvaturesuch that the focal plane of said sector magnet (3) lies substantially at right angles to theion optical axis as it passes through said focal plane. With this arrangement, motion ofdetector means (18,19) between positions in said focal plane by means of mechanicallinkages controlled from outside the vacuum system of the mass spectrometer isfacilitated.

申请人：VG INSTRUMENTS GROUP LIMITED

代理机构：Cockbain, Julian, Dr.

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