Study on the Miniature Double-focusing Magnetic Sector Mass Spectrometer

In order to meet needs of the development of space exploration missions in China,a miniature double-focusing mass spectrometer with Mattauch-Herzog structure was developed.The design is based on the principle of ion optics,the software SIMION8.1 is used for simulation,the effect of the initial state of ions and other parameters on the final focal plane imaging results is studied,and the structures are optimized.The developed mass spectrometer’s testing results show the width of H₂at 50%peak height(FWHM)is 0.0875 amu which is less than 0.1 amu,that is to say,the resolution capability of the instrument meets the design requirements.