Time of flight mass spectrometer for analysis of atom and ion radiation - analyses their initial acceleration essentially selected vertical to superimposed flight direction behind entry aperture of time of flight mass spectrometer

摘要

The spectrometer carries out analysis with an auxiliary ionisation unit in the front of its entry aperture. The atom or ion radiation are essentially introduced in its acceleration field, vertical to the initial flight direction in the time of flight mass spectrometer (TOF-MS). The TOF-MS has an angular dependent transmission as sharply defined as possible, in the plane formed from its entry axis and the speed of the atom or ion stream. Only ions with a speed component in the direction of the atom or ion stream above a min. value, arrive at the detector. The angular dependent transmission of the TOF-MS is attained by one or more shutters arranged between an entry aperture (2) and a detector (10). ADVANTAGE - In addition to high ion detection effectiveness, allows discrimination of background intensities.