Patent ID: 9671369
Date: 2017-06-06
CPC Classifications: G01N,H01J

Claim:
1. A method for determining a mobility of ions, including the steps of: a. modulating an ion beam with an ion gate which is controlled by a modulation function for generating a modulated ion beam, b. guiding said modulated ion beam through a drifting region, c. measuring a signal of said modulated ion beam after said modulated ion beam has passed said drifting region, d. calculating from the signal a blurred signal, e. calculating a difference between the signal and the blurred signal by subtracting the blurred signal from the signal, and f. calculating a correlation of said modulation function and the difference between said signal and said blurred signal in order to determine said mobility of said ions, wherein an autocorrelation of said modulation function is a two-valued function.