Abstract
The ion extraction efficiency from a trochoidal electron monochromator was investigated for the same set-up as used in previous experiments. Using the Simion program the ion trajectories in the monochromator were simulated and the ratio of the extracted ions to all ions produced was estimated. The extraction efficiency was found to change very dramatically even at low ion energies, thus, deforming measured attachment cross sections. The results of the simulation were then applied to previously measured cross-section data for dissociative electron attachment to ozone. The corrected data showed very good agreement with the experiments of other authors.
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