Confinement of pulse-injected external ions in a radiofrequency quadruple ion trap

Chun‐Sing, O; Schuessler, H. A.

doi:10.1016/0020-7381(81)85006-1

International Journal of Mass Spectrometry and Ion Physics

1981

DOI: 10.1016/0020-7381(81)85006-1

|View full text |Cite

Confinement of pulse-injected external ions in a radiofrequency quadruple ion trap

O Chun‐Sing

H. A. Schuessler

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

1993

2009

Publication Types

Select...

Article5

Relationship

Self Cite0

Independent5

Authors

Journals

Cited by 25 publications

(2 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The efficiency of trapping injected ions has been found to depend on many parameters, including ion injection directions;3–6 initial phase ϕ 6,, 7 and amplitude V RF 2,, 8 of the RF voltage V RF cos(Ωt + ϕ ) applied to a ring electrode during the ion injection period; q values;2 pressure of the buffer gas8 inside the trap; kinetic energy of injected ions;9 and so on. To understand the trapping mechanism, ion motion has been conventionally approximated using only the most dominant oscillation, i.e.…”

mentioning

confidence: 99%

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

Yoshinari

2000

Rapid Commun. Mass Spectrom.

View full text Add to dashboard Cite

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.

show abstract

mentioning

confidence: 99%

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

Yoshinari

2000

Rapid Commun. Mass Spectrom.

View full text Add to dashboard Cite

show abstract

“…Another possibility is to switch off the confinement potential during injection. Many works detail this injection mode14–18 which uses phase‐space dynamics 19–21…”

mentioning

confidence: 99%

Model for ion injection into a quadrupole ion trap to assess the distribution of initial conditions of confinement

Janulyte¹,

Zerega²,

Carette³

et al. 2008

Rapid Comm Mass Spectrometry

View full text Add to dashboard Cite

A pulsed ion-injection mode for a quadrupole ion trap is described. Switched direct current (d.c.) potentials are applied to the source and trap electrodes to inject the ions into the trap and slow them down. The injection time is sufficient to ensure a steady distribution of the injected ions at the beginning of the confinement. An elementary uni-dimensional model is detailed giving the axial positions and velocities of the ions injected into the trap. The ion distribution in phase space, the number of injected ions and the number of injected ions that will be trapped are also given. These expressions depend on ion position and velocity at the creation, applied potentials and spatial location of the source and trap electrodes. This model is validated by comparing simulation and experimental results. For this purpose the number of confined ions is plotted versus the slowing-down potentials applied on the ring and the upper end-cap of the trap. The size of the area of removable ions in the source is deduced from these results.

show abstract

A critical investigation of the effects of the radio frequency potential on the trapping of externally injected ions in ion trap mass spectrometry

Robb

Blades

1999

Rapid Commun. Mass Spectrom.

View full text Add to dashboard Cite

The sensitivity of all ion trap mass spectrometry (ITMS) methods is dependent on the trapping efficiency of the instrument. For ITMS instruments utilizing external ion sources, such as laser desorption, trapping efficiency is known to depend on the phase and amplitude of the radio frequency (RF) potential applied to the ring electrode at the time of ion introduction. It is remarkable that, in a considerable body of literature, no consensus exists regarding the effects of these parameters on the efficacy of trapping externally generated ions. In this paper, a summary of the literature is presented in order to highlight significant discrepancies. New laser desorption ion trap mass spectrometry (LD-ITMS) data are also presented, from which conclusions are drawn in our effort to clarify some of the confusion. Copyright 1999 John Wiley & Sons, Ltd.

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

hi@scite.ai

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Confinement of pulse-injected external ions in a radiofrequency quadruple ion trap

Cited by 25 publications

References 17 publications

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

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

Model for ion injection into a quadrupole ion trap to assess the distribution of initial conditions of confinement

A critical investigation of the effects of the radio frequency potential on the trapping of externally injected ions in ion trap mass spectrometry

Contact Info

Product

Resources

About