Publication

Device and method for ion mobility and charge separation, and for ion filtering

Thomas Rizzo
2025

Abstract

Ion manipulation device for driving ions in a propulsion direction comprising an electrode support for supporting one or more electrodes; a first set of RF electrodes comprising a number n of electrodes, wherein the first set of RF electrodes comprises at least three electrodes; and an RF voltage generator operatively connected to the first set of RF electrodes. The RF voltage generator is configured to generate a plurality of phase-shifted RF voltages, each consecutive phase-shifted RF voltage of the generated plurality of phase- shifted RF voltages being phase-shifted by a value of approximately 2jt/n or 2jt/n to both confine ions in a first and/or second direction and to propel ions in the propulsion direction orthogonal or non-parallel to the first and/or second direction. The electrodes of the first set of RF electrodes are operatively connected to the RF voltage generator to simultaneously receive the plurality of phase-shifted RF voltages.

Official source

https://infoscience.epfl.ch/entities/publication/ffd25ca1-b3ce-44c9-b0ff-cc1f7855ec6f

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Thomas Rizzo
2025

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/ffd25ca1-b3ce-44c9-b0ff-cc1f7855ec6f

About this result

Related concepts (32)

Ion thruster

An ion thruster, ion drive, or ion engine is a form of electric propulsion used for spacecraft propulsion. It creates thrust by accelerating ions using electricity. An ion thruster ionizes a neutral gas by extracting some electrons out of atoms, creating a cloud of positive ions. Ion thrusters are categorized as either electrostatic or electromagnetic. Electrostatic thruster ions are accelerated by the Coulomb force along the electric field direction.

Gridded ion thruster

The gridded ion thruster is a common design for ion thrusters, a highly efficient low-thrust spacecraft propulsion method running on electrical power by using high-voltage grid electrodes to accelerate ions with electrostatic forces. The ion engine was first demonstrated by German-born NASA scientist Ernst Stuhlinger, and developed in practical form by Harold R. Kaufman at NASA Lewis (now Glenn) Research Center from 1957 to the early 1960s. The use of ion propulsion systems were first demonstrated in space by the NASA Lewis "Space Electric Rocket Test" (SERT) I and II.

Electrode potential

In electrochemistry, electrode potential is the electromotive force of a galvanic cell built from a standard reference electrode and another electrode to be characterized. By convention, the reference electrode is the standard hydrogen electrode (SHE). It is defined to have a potential of zero volts. It may also be defined as the potential difference between the charged metallic rods and salt solution. The electrode potential has its origin in the potential difference developed at the interface between the electrode and the electrolyte.