Hyperboloid mass spectrometer with a truncated trap

A hyperboloid mass spectrometer is proposed in which the analyzer is a thre e-dimensional ion trap truncated by the plane z=0. The mass peaks for diffe rent operating regimes of the mass analyzer are constructed from the result s of a numerical modeling of the electric field and a simulation of the pro cess of sorting the charged particles. The results serve as a basis for the construction of a hyperboloid mass spectrometer with a simple electrode sy stem and a high resolving power. (C) 1999 American Institute of Physics. [S 1063-7850(99)02505-7].