Patent ID: 6160256
Filing Date: 2000-12-12
Classification: H01J

Abstract:
A mass spectrometric method using a time-of-flight mass spectrometer having an ion source, a pulse-generating means for producing appropriate timing pulse sequences to eject pulsed ions from the ion source, a field through which the pulsed ions from the ion source travel while dispersed according to flight velocity, and a detector for detecting the dispersed ions, said mass spectrometric method comprising the steps of:causing said pulse-generating means to produce two or more pulse sequences which, when transformed into a frequency domain, do not assume zero point at the same frequency position;ejecting ions from said ion source in response to said pulse sequences produced from said pulse-generating means;obtaining spectral signals w(t) and w'(t) from said detector when said ions are ejected from said ion source; andperforming deconvolution using pulse sequence signals h.sub.n (.tau.) and h.sub.m (.tau.) produced from said pulse-generating means, thus obtaining a spectrum y(t) which would normally be produced when a single pulse is ejected from said ion source.