Electrostatically operating optical element e.g. drift tubes, for use in ion mobility spectrometer, has mechanical assembly part, where potential is produced by resistance path on mechanical assembly part

摘要

The element has a mechanical assembly part, where potential is produced by the resistance path on the mechanical assembly part. A spiral coil consists of a resistance wire placed on a mechanical guide. The resistance path is formed on a base such that electrically resistive material is vapor-metallized on the base, where the resistive material allows interior vaporization by evaporation of a heating filament, which is positioned along a rotation axis.