US Patent 7858930 Ion-trapping devices providing shaped radial electric field

Patent 7858930 was granted and assigned to Washington State University Press on December, 2010 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Washington State University Press

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

78589300

Patent Inventor Names

Nathan K. Kaiser0

James E. Bruce0

Date of Patent

December 28, 2010

Patent Application Number

123342590

Date Filed

December 12, 2008

Patent Primary Examiner

‌

NIkita Wells

Patent abstract

Disclosed are ion cyclotron resonance (ICR) cells and other ion-trapping cells with plural groups of multiple trapping electrodes for shaping (e.g., flattening) the radial electric field within the ICR cell. Also disclosed are methods for controlling the electric field to diminish effects of de-phasing. The diminished effects are achieved by decreasing space-charge contributions by increasing the length of the ion-oscillation path along the z-axis of the ICR cell. The methods and devices enhance the time-domain signal of a Fourier-transform ion-cyclotron resonance mass spectrometer (FTICR-MS) and provide enhanced resolution and accuracy of mass measurements.