2012

Laser Ablation Electrodynamic Ion Funnel for <i>In Situ</i> Mass Spectrometry on Mars

A front-end instrument, the laser ablation ion funnel, was developed, which would ionize rock and soil samples in the ambient Martian atmosphere, and efficiently transport the product ions into a mass spectrometer for in situ analysis.

Laser ablation creates elemental ions from a solid with a high-power pulse within ambient Mars atmospheric conditions. Ions are captured and focused with an ion funnel into a mass spectrometer for analysis. The electrodynamic ion funnel consists of a series of axially concentric ring-shaped electrodes whose inside diameters (IDs) decrease over the length of the funnel. DC potentials are applied to each electrode, producing a smooth potential slope along the axial direction. Two radio-frequency (RF) AC potentials, equal in amplitude and 180° out of phase, are applied alternately to the ring electrodes. This creates an effective potential barrier along the inner surface of the electrode stack. Ions entering the funnel drift axially under the influence of the DC potential while being restricted radially by the effective potential barrier created by the applied RF. The net result is to effectively focus the ions as they traverse the length of the funnel.

This work was done by Paul V. Johnson and Robert P. Hodyss of Caltech, and Keqi Tang and Richard D. Smith of PNNL for NASA’s Jet Propulsion Laboratory. For more information, contact This email address is being protected from spambots. You need JavaScript enabled to view it.. NPO-47638

White Papers

Reducing Development Cycles for 3U VPX Systems
Sponsored by Curtiss-Wright Controls Embedded Computing
Silicones Meet the Needs of the Electronics Industry
Sponsored by Master Bond
Sense Element Pump Ripple Fatigue
Sponsored by Hydra Electric
Adhesion Reduction of Semiconductor Dicing Tape
Sponsored by Excelitas
The Less is More Approach to Robotic Cable Management
Sponsored by igus
Controlling the EMI Effects of Avionic Equipment
Sponsored by Orbel

White Papers Sponsored By:

The U.S. Government does not endorse any commercial product, process, or activity identified on this web site.