title: The effects of entrance fields on the performance of quadrupole mass spectrometers.
abstract: The theoretical performance of quadrupole mass spectrometers has been studied by means of a new computer model, with particular reference to three-dimensional ion trajectories, both within the main filter and the entrance fields, including the effects of z-energy changes in the latter. It is shown that considerable improvements in acceptance area can be obtained by suitable modification of the entrance fields.
authors: 8 Cranmere Drive, Sale, Cheshire, UK. aebanner@hotmail.co.uk
authors: A E
authors: AE
authors: Banner