The use of an electrostatic quadrupole as a field lens in a double-focusing mass spectrometer Back to all publications Publication date 1 January 1985 Reference C.E.D. Ouwerkerk, A.J.H. Boerboom, T. Matsuo and T. Sakurai, The use of an electrostatic quadrupole as a field lens in a double-focusing mass spectrometer, Int. J. Mass Spectrom. Ion Processes 65, 23-29 (1985)