| 摘要 |
PURPOSE:To remove aberration arising from dispersion of energy and increase mass dispersion, by connecting in series a focusing duplex field and diverging duplex field in arrangement with one of them to a positive magnetic field type and the other to a diamagnetic field type. CONSTITUTION:When two duplex fields are connected so as to obtain a same direction of rotation of an ion, the first focusing duplex field by a magnet 1 and electrodes 2, 3 and the second diversing pile field by a magnet 4 and electrodes 5, 6 are constituted. To between the electrodes 2, 3 and between 5, 6, voltages are applied respectively from variable power sources 7, 8 then a sweeping action of said voltage performs sweeping operation of the mass quantity of ion passing through the first and second duplex fields and incident upon a collector C. The first duplex field is arranged to a positive magnetic field type, where force in the magnetic field acts in a direction toward the rotary center of an ion, while the second duplex field to a diamagnetic field type, where force in the magnetic field acts in a direction separating from the rotary center of the ion, thus imaging of an intermediate actual image can be obtained in an intermediate slit S2. |
