SEARCH Articles Figures Tables Double focusing Double mass spectrometer Double-focusing mass Double-focusing sector Double-focusing sector field mass spectrometer Double-focusing sector field mass spectrometer with Mattauch-Herzog geometry Double-focusing sector field mass spectrometer with Nier-Johnson geometry Double-focusing sector mass Double-focusing spectrometer Magnetic sector mass spectrometers double-focusing Mass spectrometer high-voltage, double-focusing, sector Sector Sector mass spectrometers Sectorization