Abstract
Ion optics of high-performance mass spectrometers of double-focusing type is investigated. The characteristics of mass spectrometers are normally determined by the resolving power and the transmission of the apparatus. In addition to these, its geometrical size, cost and weight are also important factors. In order to estimate these characteristics numerically, a performance factor, PF, and an aberration factor, AF, are introduced and defined. Ion-optical systems with the field arrangement QQQOHQC (quadrupole, quadrupole, quadrupole, octupole, homogeneous magnetic sector, quadrupole, cylindrical electric sector) are investigated with the objective to obtain large PF and AF simultaneously. Almost perfect second- and third-order focusing and high performance are attained.
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Schedule a callMore From: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
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