Abstract
A new multi-turn time-of-flight mass spectrometer ‘MULTUM II’ was constructed. The ion optical system was simplified comparing with ‘MULTUM Linear plus’. The multi-turn part of the new instruments consisted of only four toroidal electric sector fields. The mean radius of cylindrical electric sector was 50 mm and the deflection angle was 157.1°. The total flight pass length of one cycle was 1.308 m. In a preliminary experiment, the mass spectra of Xe ion were measured and enhancement in mass resolution with increasing number of cycles was obserbed. The mass resolution 5100 at m/z 136 was achieved after 10 cycles.
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