Numerical simulation of autoresonant ions oscillations in an anharmonic electrostatic trap

This work presents the results of modelling the ion dynamics in the ART-MS (Autoresonant Trap Mass Spectrometry) device in the quasi-static approximation. This instrument utilizes an anharmonic, purely electrostatic trap for ion confinement and a radio frequency (RF) voltage source with decrementall...

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Bibliographic Details
Published inarXiv.org
Main Authors López, J E, Paez-González, C J, Hernández, A, Orozco, E A, Tsygankov, P, Parada-Becerra, F F
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 21.08.2024
Subjects
Anharmonicity
Electric potential
Higher harmonics
Ion dynamics
Ion extraction
Mass spectrometry
Numerical models
Radio frequency
Resonant frequencies
Voltage
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Summary:This work presents the results of modelling the ion dynamics in the ART-MS (Autoresonant Trap Mass Spectrometry) device in the quasi-static approximation. This instrument utilizes an anharmonic, purely electrostatic trap for ion confinement and a radio frequency (RF) voltage source with decrementally varying frequency for selective ion extraction. The autoresonant interaction between the oscillatory motion of the ion and the RF voltage causes an increase in the amplitude of certain confined ions, allowing their selective extraction. Numerical modelling shows that the extraction of ions with a given mass occurs not only at the fundamental frequency but also at its harmonics. This effect reduces the selective properties of devices of this type because along with the main mass component for a given frequency, it is possible to enter the detector channel of ions with another mass, for which this frequency corresponds to the second or higher harmonics, even a superposition of some of these harmonics of different ions.
ISSN:2331-8422