Abstract
The problem of compensation of the initial ion energy spread by a multigap grid reflector of the time-of-flight mass spectrometer is considered. It is shown mathematically that the problem can be reduced to analysis of properties of catastrophes An under additional conditions of positive geometrical gaps of the reflector. Examples of design of reflectors corresponding to catastrophes A2 and A3 are analyzed. The advantage of a three-gap reflector over a two-gap reflector in the compensation of a large energy spread of ions for the same value of the resolution of the device is demonstrated. The application of the three-gap reflector improves the sensitivity of the time-of-flight mass spectrometer. The results of calculations are confirmed experimentally.
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