Confinement of ions created externally in a radio-frequency ion trap

Chun‐Sing, O; Schuessler, H. A.

doi:10.1063/1.329731

Cited by 21 publications

(1 citation statement)

References 18 publications

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“…In this regime, trapping occurs only at certain RF phases that depend on the kinetic energy of the incoming ions, and ions are trapped with a wide range of kinetic energies. Earlier simulations have also proposed that this mechanism is responsible for trapping ions injected into 3D quadrupole traps [44][45][46], where a strong dependence on the RF phase was also observed, but no attempts to describe the findings starting from the work-energy theorem were done.…”

Section: Discussionmentioning

confidence: 99%

Trapping ions from a fast beam in a radio-frequency ion trap: Exploring the energy exchange with the longitudinal radio-frequency field

et al. 2013

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The possibility of injecting ions from an initially fast moving beam into a multipole radio-frequency (RF) ion trap without the use of buffer gas is described. The chosen trap geometry gives rise to an oscillating electric field along the direction of the incoming ions, and through an analytical model as well as numerical simulations it is demonstrated that the energy exchange between the injected ions and this oscillating field governs the trapping dynamics. Most notably, if ions arrive at the trap during specific phases of the RF field, they can be effectively decelerated and stored with low kinetic energy even if their kinetic energy initially exceeds the depth of the trapping potential well. An experimental apparatus for trapping ions from a fast beam is described, and experimental investigations demonstrating the described trapping dynamics are presented.

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Section: Discussionmentioning

confidence: 99%

Trapping ions from a fast beam in a radio-frequency ion trap: Exploring the energy exchange with the longitudinal radio-frequency field

et al. 2013

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Theoretical and numerical analysis of the behavior of ions injected into a quadrupole ion trap mass spectrometer

Yoshinari

2000

Rapid Commun. Mass Spectrom.

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A numerical simulation method has been developed for the analysis of trapping ions injected into an ion trap mass spectrometer. This method was applied to clarify the effects of the following parameters on trapping efficiencies: (1) initial phase of the radio frequency (RF) drive voltage, (2) ion injection energy, and (3) RF peak voltage while injecting ions. The following conclusions were obtained by theoretical and simulation approaches. 1. The second and third dominant oscillations contribute significantly to the trapping mechanism of the injected ions, even for low q values. 2. A formula relating the operating parameters, which gives the maximum trapping efficiency, is derived. 3. Based on the above-mentioned formula, an advanced injection method is proposed, in which the RF peak voltage is decreased while injecting ions. The ability of this method to solve the problem of unequal sensitivity among different ion species is indicated by numerical simulation. Copyright 2000 John Wiley & Sons, Ltd.

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Some properties of ion trajectories in the radial plane of an axially symmetric ion trap

Sheretov

Philippov

Karnav

et al. 2002

Rapid Comm Mass Spectrometry

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In this article we analyse the trajectories of externally generated ions injected in the radial plane into the ion trap. The shape of the envelope curves for two-dimensional (2D) ion trajectories is determined. Conditions under which these envelope curves can be transformed into circles are found. We show that the amplitude of ion oscillations is a minimum in this case and that this mode corresponds to optimised ion trapping conditions. Also we discuss a ring-shaped ion trap mass spectrometer electrode system which consists of two ring electrodes, and which utilises ion trajectories with circular envelope curves.

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Confinement of ions created externally in a radio-frequency ion trap

Cited by 21 publications

References 18 publications

Trapping ions from a fast beam in a radio-frequency ion trap: Exploring the energy exchange with the longitudinal radio-frequency field

Trapping ions from a fast beam in a radio-frequency ion trap: Exploring the energy exchange with the longitudinal radio-frequency field

Theoretical and numerical analysis of the behavior of ions injected into a quadrupole ion trap mass spectrometer

Some properties of ion trajectories in the radial plane of an axially symmetric ion trap

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