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We have designed and fabricated a miniaturized, light-weight magnetic sector for a focal plane mass spectrograph (Mattauch–Herzog design) by using a new high-energy-product magnet material (Nd-B-Fe alloy), and a high permeability magnet yoke material (V-Co-Fe alloy). The magnetic sector weighs less than 10 kg and has a focal plane of 5.1 cm in length and covers a nominal mass range of 40–240 amu. Such a magnetic sector in conjunction with an array detector and a short microbore capillary column is eminently suited for the development of a field-portable gas chromatograph-mass spectrometer instrument of high performance.
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Sinha et al. (1991) studied this question.
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