FIELD: physics.
SUBSTANCE: multi-reflection ion-optical device includes electrostatic field generating means configured to generate an electrostatic field defined by superposition of first and second distributions of electrostatic potential ΦEF, ΦLS. The first distribution ΦEF subjects ions to energy focusing in a flight direction and the second distribution ΦLS subjects ions to stability in one lateral direction, to stability in another lateral direction for the duration of at least a finite number of oscillations in the one lateral direction and to subject ions to energy focusing in the one lateral direction for a predetermined energy range.
EFFECT: high lateral stability in the drift direction.
16 cl, 9 dwg
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