1, The maintenance experinence of old MAT isotope mass spectrometer has been discussed.

2, The research on isotope mass spectrometers in China since 1980 is reviewed.

3, The heavy ion beam energy, as well as the charge stripping efficiency, was calculated by using the charge state stripping formula and empirical formula of stable isotope mass number .

4, This article briefly describes the thoughts, key points and test result of a low noise pulse amplifier used in Laser Isotope Mass Spectrometer.

5, System stability (Ss) is one of the most important specifications of the Isotope mass spectrometer (IMS). It influences the quality of the data detected by the IMS directly.