Vacuum ultraviolet photoionization and chemical ionization compound ionization source based on radio frequency electric field enhancement of quadrupole rod
A technology of vacuum ultraviolet light and chemical ionization, applied in the direction of ion source/gun, circuit, discharge tube, etc., can solve the problems of short residence time, fast movement speed, limited sensitivity of chemical ionization, etc., to improve ionization efficiency and detection Sensitivity and residence time improvement effects
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[0026] Such as figure 1 As shown, a vacuum ultraviolet photoionization and chemical ionization composite ionization source based on quadrupole radio frequency electric field enhancement, including a vacuum ultraviolet light source 1, an ionization chamber cavity 2, two or more transmission electrodes 4, and a metal grid 5. The quadrupole rod 6 and the vacuum differential hole electrode 7 are provided with a sample gas capillary 3 interface, a reagent gas capillary 11 interface, a vacuum gauge 8 interface and a mechanical vacuum pump 9 exhaust port on the wall of the ionization chamber cavity.
[0027] The transmission electrode 4 is placed inside the ionization chamber cavity 2 and consists of four electrodes with a spacing of 3 mm. The transmission electrodes 4 have through holes in the axial direction. The transmission electrodes 4 are arranged parallel to each other at intervals, and the through holes are coaxial.
[0028] An ultraviolet light inlet is provided on the wall ...
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