Patents by Inventor Mikhail Soudakov

Mikhail Soudakov has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Geometry for generating a two-dimensional substantially quadrupole field
    Patent number: 6897438
    Abstract: A method and apparatus for manipulating ions using a two-dimensional substantially quadrupole field, and a method of manufacturing an apparatus for manipulating ions using a two-dimensional substantially quadrupole field are described. The field has a quadrupole harmonic with amplitude A2, an octopole harmonic with amplitude A4, and higher order harmonics with amplitudes A6 and A8. The amplitude A8 is less than A4. The A4 component of the field is selected to improve the performance of the field with respect to ion selection and ion fragmentation. The selected A4 component can be added by selecting a degree of asymmetry under a 90° rotation about a central axis of the quadrupole. The degree of asymmetry is selected to be sufficient to provide the selected A4 component.
    Type: Grant
    Filed: August 5, 2002
    Date of Patent: May 24, 2005
    Assignee: University of British Columbia
    Inventors: Mikhail Soudakov, Donald J. Douglas, Chuan-Fan Ding
  • Geometry for generating a two-dimensional substantially quadrupole field
    Publication number: 20040021072
    Abstract: A method and apparatus for manipulating ions using a two-dimensional substantially quadrupole field, and a method of manufacturing an apparatus for manipulating ions using a two-dimensional substantially quadrupole field are described. The field has a quadrupole harmonic with amplitude A2, an octopole harmonic with amplitude A4, and higher order harmonics with amplitudes A6 and A8. The amplitude A8 is less than A4. The A4 component of the field is selected to improve the performance of the field with respect to ion selection and ion fragmentation. The selected A4 component can be added by selecting a degree of asymmetry under a 90° rotation about a central axis of the quadrupole. The degree of asymmetry is selected to be sufficient to provide the selected A4 component.
    Type: Application
    Filed: August 5, 2002
    Publication date: February 5, 2004
    Inventors: Mikhail Soudakov, Donald J. Douglas, Chuan-Fan Ding