Patent ID: 8664592
Filing Date: 2014-03-04
Classification: H01J

Abstract:
1. A time-of-flight mass spectrometer having an energy supplier for giving ions to be analyzed a constant amount of energy to make the ions fly and a time-of-flight mass separator for separating the energy-given ions for each mass-to-charge ratio according to the difference in their flight time, wherein: the mass separator includes a free-flight space in which ions are allowed to fly without being influenced by an electric field, a reflectron having a plurality of electrodes for creating an electric field which acts on the ions flying in the free-flight space to reflect the ions backward, and a voltage supplier for applying a direct-current voltage to each of the electrodes of the reflectron; and the voltage supplier applies the direct-current voltage to each of the electrodes so that: where m is a mass of an arbitrary ion of interest.