The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 11, 2002
Filed:
May. 05, 2000
Craig M. Whitehouse, Branford, CT (US);
Erol Gulcicek, Cheshire, CT (US);
Analytica of Branford, Inc., Branford, CT (US);
Abstract
A multipole ion guide is configured to improve the transmission efficiency of ions which traverse the length of one ion guide and enter either another multipole ion guide such as a quadrupole mass analyzer or a three dimensional ion trap. The ion transfer multipole ion guide radial dimensions are reduced such that the pole assembly and an appropriately shaped exit lens can be positioned within a portion of the internal space defined by the larger radius second multipole ion guide poles. Ions exiting the first ion guide of reduced size find themselves inside the second ion guide close to the centerline. In this manner ions can be efficiently transferred from one ion guide to another, even for those ions with low kinetic energies. In a second embodiment of the invention, the exit region of a multipole ion guide is configured such that the multipole ion guide poles can be extended into a counterbore of a three dimensional ion trap end cap electrode. With this configuration, ions (including those with low kinetic energies) can be transferred into a three dimensional ion trap with increased trapping efficiency.