| 摘要 |
<p>PROBLEM TO BE SOLVED: To enhance the total detecting efficiency of a photoionization mass spectrometer. SOLUTION: A photoionization mass spectrometer is composed of an elliptical spherical mirror 10 which owns geometrical focuses jointly, of a laser device 6 which is arranged in such a way that a pulsed laser beam 7 is condensed on one of the geometrical focuses 11, of a lens 12, of an ion gun 2 which shines a pulsed laser beam 3 at a sample, of a mass spectrometer 9 and of the like. Pulses of a laser beam are passed repeatedly through an identical position on the sample, a laser intensity due to the overlap of the pulses is increased, and an ionization efficiency is increased.</p> |
