DEVICE FOR CREATION OF VOLTAGE ON PROTECTIVE SCREEN OF ION CURRENT COLLECTOR OF ION MOBILITY SPECTROMETER Russian patent published in 2017 - IPC H01J49/40 G01N27/64 

FIELD: electricity.

SUBSTANCE: one of the embodiments of the device for the creation of voltage on the protective screen of the ion current collector is to use a voltage follower that can be implemented in a feedback operational amplifier, in an emitter or common-drain follower. To stabilise the voltage level and exclude pulsations on the protective screen, at the output of the voltage follower, at least one capacitor and one resistor are installed. Another embodiment of the device for the creation of voltage on the protective screen of the ion current collector is to use a controlled bipolar voltage source with fast switching of polarity of output voltage, for example implemented on the basis of two independent controlled voltage sources, one for the positive and another for the negative polarity, each equipped with at least one capacitor and one resistor to limit the pulsations and drift of the output voltage and at least one key for switching the output voltage to the protective screen when switching polarity.

EFFECT: possibility of controlling the voltage level on the protective screen independently for positive and negative polarities for flexible adjustment of the electric field in area of the collector and optimizing the collection of ions of different polarities, high speed of switching voltage polarity on the protective screen, absence of voltage drift on the protective screen after switching polarities, reduction of frequency compensation and time of setting potentials in the high voltage divider.

5 cl, 6 dwg