Foreword

Greenfield, Dmitry; Monastyrskiy, Mikhail

doi:10.1016/s1076-5670(08)00812-4

Selected Problems of Computational Charged Particle Optics

2009

DOI: 10.1016/s1076-5670(08)00812-4

|View full text |Cite

Foreword

Dmitry Greenfield¹,

Mikhail Monastyrskiy²

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

2015

Publication Types

Select...

Article1

Relationship

Self Cite1

Independent0

Authors

Journals

Cited by 1 publication

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The electric field sags into the injection slot as illustrated in Figure 3. To simulate the effect, an imaginary axisymmetric surface was introduced to cover the injection slot, on which the potential error was calculated with the boundary element 3D algorithm as described in [7]. The zero axial harmonic of this error was considered as a boundary condition for an axisymmetric Dirichlet problem, which was solved using the finite-element method.…”

mentioning

confidence: 99%

Control of Aberration and Space-Charge Effects in the Orbitrap Mass Analyzer

2015

Self Cite

View full text Add to dashboard Cite

The idea of orbital ion confinement dates back to 1923 when the orbital ion trap was proposed and implemented by Kingdon [1]. In the following several decades this principle was often used in ion spectroscopy but it was not until 1981 that Knight proposed a mass-selective orbital ion trap [2]. Similar to Kingdon trap, the ions were trapped revolving around a negatively biased wire. The ions generated by laser ionization were captured in the trap where rudimentary mass analysis was performed by means of resonance excitation of axial oscillations between two conical guarding electrodes that formed a quasiharmonic potential well. This first attempt demonstrated that the quality of mass analysis mostly depends on the trapping field accuracy, and particularly, on the isochronism of the axial oscillatory motion.The simplest axisymmetric electrostatic potential distribution with ideal isochronism in the axial direction is given by the formulawhere and k 0 are geometrical parameters and is the applied voltage. A detailed description of the ion dynamics in the quadro-logarithmic potential Eq. (1) can be found in the paper by Gall et al. [3]. The most important property of this unique potential distribution is that the motion equations are separable for the axial coordinate and the other coordinates (radius and the rotational angle ), and the axial motion is harmonic. The axial oscillation frequency in the ideal field isand thus depends on the ion's mass-to-charge ratio / but not on the oscillation amplitude and the revolving radius. It means that a bunch of identical ions, once injected into the trap, keeps oscillating as a single packet preserving the phase coherency. Having detected the oscillation frequency, one can determine the mass-to-charge ratio of the ions and construct a mass spectrum of the analyte. The other important property of the quadro-logarithmic potential is the confinement in the radial pseudopotential 176

show abstract

mentioning

confidence: 99%

Control of Aberration and Space-Charge Effects in the Orbitrap Mass Analyzer

2015

Self Cite

View full text Add to dashboard Cite

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.

Foreword

Cited by 1 publication

References 0 publications

Control of Aberration and Space-Charge Effects in the Orbitrap Mass Analyzer

Control of Aberration and Space-Charge Effects in the Orbitrap Mass Analyzer

Contact Info

Product

Resources

About