| 摘要 |
PROBLEM TO BE SOLVED: To make variable the aperture of an orifice provided on a partioning wall for partitioning an intermediate chamber and a measuring chamber of a mass spectrometer for arbitrarily regulating the sensitivity and resolution of ions. SOLUTION: This mass spectrometer is composed of an ion source 1 for ionizing a sample, an intermediate chamber 3 for receiving ions generated in the ion source 1 in a following step, and a measuring chamber 8 located downstream of the chamber 3 and arranged with various kinds of constituents for an ion optical system. A variable slit 10 with various kinds of apertures and a restriction of which an aperture is arbitrarily made variable are provided in a partitioning wall part for partitioning the chamber 3 and the chamber 8. |
