HIGH RESOLUTION TIME-OF-FLIGHT MASS SPECTROMETER

摘要

Mass spectrometers and related methods of making and using the same are disclosed herein that generally involve positioning a blocking or masking element in the path of an ion beam passing through the mass spectrometer so as to selectively block at least a portion of the ions in the ion beam from entering an accelerator. Mass spectrometers and related methods are also disclosed in which an ion beam passing through the mass spectrometer is deflected or otherwise aimed so as to approach a TOF axis of an accelerator at a non-zero angle.

主权项

1. A mass spectrometer, comprising:
an accelerator having an inlet aperture through which an ion beam can be directed; and a masking element disposed upstream from the accelerator and configured to selectively block at least a portion of the ion beam from entering the accelerator; wherein the portion of the ion beam is either a central portion of the ion beam or only one edge of the ion beam.