Abstract: A method and apparatus are provided for providing an ion transmission device or interface between an ion source and a spectrometer. The ion transmission device can include a multipole rod set and includes a damping gas, to damp spatial and energy spreads of ions generated by a pulsed ion source. The multipole rod set has the effect of guiding the ions along an ion path, so that they can be directed into the inlet of a mass spectrometer. The invention has particular application to MALDI (matrix-assisted laser desorption/ionization) ion sources, which produce a small supersonic jet of matrix molecules and ions, which is substantially non-directional, and can have ions travelling in all available directions from the source and having a wide range of energy spreads.
Type:
Application
Filed:
November 21, 2001
Publication date:
June 27, 2002
Applicant:
Universtiy of Manitoba
Inventors:
Andrew N. Krutchinsky, Alexandre V. Loboda, Victor L. Spicer, Werner Ens, Kenneth G. Standing