An arrangement for a double-focusing mass spectrometer in which a deflection of π 2 radians in a radial electrostatic field analyser is followed by a magnetic deflection of π 3 radians. The electrostatic analyser uses a symmetrical object-image arrangement and the magnetic analyser is used asymmetrically.
Sources:
Orange Book, 2nd ed., p. 201 (https://media.iupac.org/publications/analytical_compendium/)
PAC, 1991, 63, 1541. 'Recommendations for nomenclature and symbolism for mass spectroscopy (including an appendix of terms used in vacuum technology). (Recommendations 1991)' on page 1546 (https://doi.org/10.1351/pac199163101541)