Igor Spivak-Lavrov
Aktobe Regional State University, Kazakhstan
Title: Time-of-flight mass analyzers based on a wedge-shaped electrostatic mirror with 2d field
Biography
Biography: Igor Spivak-Lavrov
Abstract
The paper deals with the wedge-shaped mirror with two-dimensional (2D) field as an orthogonal ion accelerator and a TOF mass analyzer. The inhomogeneous electric field in the mirror created without the use of meshes and blinds by changing the potentials on the boundary electrodes of mirror. Analytical expressions for the electrostatic potential of mirror field obtained. The ions are extracted from the ion source by impulse activation of the accelerating electric field. Since the ions are extracted from various points of the source, even ions with identical masses acquire different velocities during acceleration. As a result, the “rear†ions of the packet catch up with the “front†ions, and packets of ions with identical masses compress in the direction of movement. By placing the detector in a plane with the greatest compression of ion packets, one creates a time-of-flight mass spectrometer. Efficient space-time focusing allows a small mass spectrometer to achieve high resolution and sensitivity. The paper also suggests and calculates new schematics of multi-stage and multi-reflection TOF mass analyzers with wedge-shaped mirrors with 2D field.