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In precise measurement of multi-photon resonant ionization cross section,the experimental uncertain- ties caused by the instability of laser power output can be reduced,if the powers of each laser beams and the intensity of the ionized ions are acquired synchronously for normalization. In the multi-step laser resonant ionization experiment,there are three laser beams,whose power in- tensities are monitored by thermocouple power-meter with output of direct-current voltage,the intensity of
In precise measurement of multi-photon resonant ionization cross section, the experimental uncertainty-strains caused by the instability of laser power output can be reduced, if the powers of each laser beams and the intensity of the ionized ions are acquired synchronously for normalization. In the multi-step laser resonant ionization experiment, there are three laser beams, whose power in- tensities are monitored by thermocouple power-meter with output of direct-current voltage, the intensity of