The present invention relates to a Fourier transform mass spectrometer suitable for analysis of a particular component of a sample gas made of known components, which is adapted so as to prevent the high-frequency electric field applied to the high vacuum cell from deviating due to a variation in the...http://www.google.ca/patents/US5264697?utm_source=gb-gplus-sharePatent US5264697 - Fourier transform mass spectrometer
