Permanent magnet ion trap and mass spectrometer using such a...

Details Permanent magnet ion trap and mass spectrometer using such a... Permanent magnet ion trap and mass spectrometer using such a...

H - Electricity

01

J

H01J 49/38 (2006.01)

Patent

CA 2475352

Disclosed is a vacuum ion trap comprising a sealed processing space (4) and a permanent magnet (30) which defines a cavity (32) and creates a directed magnetic field (B) in said cavity (32). The sealed space (4) is arranged in the cavity (32) and houses a confinement cell comprising at least two trapping electrodes which are located parallel to each other and perpendicular to the directed magnetic field (B) and are connected to a voltage generator (12). The inventive ion trap comprises at least one permanent magnet (30) which is shaped as a hollow cylinder and structured like a Halbach cylinder so as to create a permanent magnetic field (B) that lies perpendicular to the longitudinal axis (XX') of the cavity of said magnet (30). The invention applies particularly to Fourier-transform ion cyclotron resonance (FTICR) mass spectrometry.

Ce pi~ge ~ ions sous vide comportant une enceinte de traitement ~tanche (4) et un aimant permanent (30) d~limitant une cavit~ (32) et cr~ant un champ magn~tique orient~ (B) dans ladite cavit~ (32), ladite enceinte (4) ~tant dispos~e dans ladite cavit~ (32) et renfermant une cellule de confinement (8) comprenant au moins deux ~lectrodes de pi~geage (10) parall~les entre elles et perpendiculaires audit champ magn~tique orient~ (B), lesdites ~lectrodes de pi~geage (10) ~tant connectables ~ un g~n~rateur de tension (12). Il est caract~ris~ en ce qu'il comporte au moins un aimant (30) permanent en forme de cylindre creux, structur~ selon une structure de type cylindre de Halbach, afin de g~n~rer ledit champ magn~tique permanent (B) orient~ perpendiculairement ~ l'axe longitudinal (XX') de la cavit~ dudit aimant (30). Application notamment ~ la spectrom~trie de masse par transform~e de Fourier (FTICR).

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