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Pacific Northwest National Laboratory won a 1999 R&D 100 Award for the Electrodynamic Ion Funnel. The funnel is a revolutionary development that focuses ions in gases, greatly improving the sensitivity of devices such as mass spectrometers that depend on ion formation and transfer in the presence of gases.

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Document Title: 1999 R&D 100 Awards
Category: People: Awards
Media Type: Photos
Date of Image/Photo: July 17, 1999
Background: The Electrodynamic Ion Funnel focuses ions in gases, greatly improving the sensitivity of devices such as mass spectrometers that depend on ion formation and transfer in the presence of gases. The funnel uses a series of ring electrodes of increasingly smaller internal diameters to which radiofrequency (RF) and direct current (DC) electric potentials are co-applied. The combination of collisions with neutral gas and the combined RF and DC electric fields cause the ions to be more effectively focused and transmitted, significantly enhancing the sensitivity of the mass spectrometer. Applying the RF electric fields to the ring electrodes creates an effective repulsive field near the surface of the ion funnel that prevents ions from penetrating or being lost to the walls of the funnel. The co-applied DC electric field serves to push ions "down the throat" of the Electrodynamic Ion Funnel. The combination of electric fields results in highly efficient focusing -- close to 100% ion efficiency in the transmission of ions to the mass analyzer. This results in an enormous gain in the sensitivity of the analyzer. Forty- to eighty-fold gains in sensitivity are routine for conventional mass spectrometers retrofitted with an Electrodynamic Ion Funnel.
URL of this page: http://picturethis.pnl.gov/picturet.nsf/by+id/SMAA-49TN23

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