Search International and National Patent Collections

1. (WO2013119283) MULTI PULSE LINEAR IONIZER

Pub. No.:    WO/2013/119283    International Application No.:    PCT/US2012/064045
Publication Date: Fri Aug 16 01:59:59 CEST 2013 International Filing Date: Fri Nov 09 00:59:59 CET 2012
IPC: H01T 23/00
Applicants: ILLINOIS TOOL WORKS INC.
Inventors: PARTRIDGE, Leslie
GEFTER, Peter
OLDYNSKI, Edward
Title: MULTI PULSE LINEAR IONIZER
Abstract:
An embodiment of the invention provides an apparatus and a method for generating ions within a space separating an emitter and a reference electrode, including: providing at least one pulse train to the emitter, the pulse train pair including a positive pulse train and a negative pulse train the alternate in sequence, the positive pulse train including a first plurality of ionizing positive voltage pulses during a positive phase and a second plurality of ionizing positive voltage pulses during an ionization frequency phase which occur after the positive phase, and the negative pulse train including a first plurality of ionizing negative voltage pulses during the ionization frequency phases a second plurality of ionizing negative voltage pulses during a negative phase which occur after the ionization frequency phase; wherein each of the first plurality of ionizing positive voltage pulses has a greater magnitude than a magnitude of each of the second plurality of ionizing positive voltage pulses; and wherein each of the first plurality of ionizing negative voltage waveform has a greater magnitude than a magnitude of each of the second plurality of ionizing negative voltage pulses.