| 摘要 |
<p>A codirectional dual-channel time-of-flight mass spectrometer. The mass spectrometer comprises parallel dual-channel accelerators (1), a miniature vacuum cavity (2), a laser sputtering ion source (3), two ion signal detectors (4, 5), and an ion collimator (6). Ion beams generated by the laser sputtering ion source (3) pass through the ion collimator (6) and are divided by the dual-channel accelerators (1) into an upper part and a lower part, and the two parts are respectively transversely accelerated, deflected, and focused to the two upper and lower ion signal detectors (4, 5); therefore, an ion time-of-flight mass spectrum of two upper and lower channels is obtained. One ion signal detector (4) can be replaced by an electron energy analyzer, to carry out a photoelectron energy spectrum experiment for selecting a certain ion at the same time. The whole instrument is compact, small and exquisite, simple in structure, and convenient to operate. The electron energy spectrum of the acquired ion has a high signal to noise ratio and a high resolution.</p> |
