Geometric optimization of toroidal ion trap based on electric field analysis and SIMION simulation

Yu, Quan; Li, Man; Lu, Xinqiong; Wang, Xiaohao

doi:10.1016/j.ijms.2018.09.003

Cited by 3 publications

(6 citation statements)

References 19 publications

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“…On the basis of the structure of the two ion traps and the actual experimental parameters, the SIMION simulation model is reestablished based on the previous simulation platform and parameters (RF: 998 kHz, AC: 349 kHz 1 V, scan rate: 0.2 V/μs, mean free path: 10 mm, buffer gas: N 2 ), 23 and the kinematic characteristics of the ions in the two traps from trapping cooling to resonance excitation are studied. The simulation study selected three kinds of ions with different mass‐to‐charge ratios, all of which have 3000 ions.…”

Section: Resultsmentioning

confidence: 99%

“…The electric field line distribution in the ARIT near the convex side is highly dense, while the electric field distribution in the concave side is sparse. According to electric field gradient theory, 23 this distribution will make it easier for the ions to move to the sparse side of the electric field under the electric field force when the ions are excited and ejected. Therefore, the ions in the ARIT trap are constrained and concentrated near the concave side and are more likely to move toward the concave side under the action of the electric field.…”

Section: Resultsmentioning

confidence: 99%

“…The asymmetric rectilinear ion trap (ARIT) analyzer used in this experiment was developed from a conventional RIT (as shown in Figure 2A) but with different structural modifications to the two X‐electrodes. Shown as Figure 2B, according to the previous simulation results, 23 an ion trap with asymmetrical space in the trap is constructed by adding a semicircle with the convex and concave radius of 2.5 mm ( r ) and the convex height and a concave depth of 1 mm ( h ) to the left and right plates. In this structure, the ions tend to be ejected from the concave side.…”

Section: Methodsmentioning

confidence: 99%

“…The methanol reagents used in this experiment were purchased from path: 10 mm, buffer gas: N 2 ), 23 and the kinematic characteristics of the ions in the two traps from trapping cooling to resonance excitation are studied. The simulation study selected three kinds of ions with different mass-to-charge ratios, all of which have 3000 ions.…”

Section: Reagentmentioning

confidence: 99%

“…In our previous research, a simplified electric field analysis method coupled with SIMION modeling was used to perform the geometric optimization of the toroidal ion trap. 23 It was found that asymmetric modification of the electrodes could effectively compensate for the electric field defect and improve the inward ejection efficiency of ions. This structural modification method herein is extended to modify a typical RIT analyzer.…”

Section: Introductionmentioning

confidence: 99%

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Asymmetric rectilinear ion trap with unidirectional ion ejection capability

et al. 2020

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In this paper, the shapes of the electrodes are modified based on a rectilinear ion trap to achieve unidirectional ejection of ions. The designed asymmetric rectilinear ion trap (ARIT) analyzer adds convex and concave circular structures with a height of 0.5 mm on the two X-electrodes, so that the electric field center of the ion trap is inclined to the concave side. The electric field lines of the convex side are compressed to the concave side. Both simulations and experimental results show that ions are more likely to emit from the slit on the concave side plate when performing ion resonance ejection. The mass spectrum signal intensity can reach more than twice that of the original rectilinear trap when using only one detector. Calculations of the electric field components in the trap show that the even-order higher field proportion in the ion trap has not been significantly affected. Combined with the experimental test results, the study further confirmed that the developed ARIT has no significant loss in mass resolution, tandem mass spectrometry capability, and quantitative analysis capability. The proposed asymmetric structure modification scheme can achieve single-side ejection without significantly affecting other performances of the analyzer, which provides a new idea for the structural optimization of the subsequent ion trap analyzers.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Reagentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Asymmetric rectilinear ion trap with unidirectional ion ejection capability

et al. 2020

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Structures and infrared photodissociation of [(aniline)-(methanol)-(water)2]+

Choi

Kim

Jeong

et al. 2019

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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Fabricating an Electrospray Ionization Chip Based on Induced Polarization and Liquid Splitting

Zhou

Zhang

et al. 2021

Micromachines

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The coupling of the microfluidic chip to mass spectrometry (MS) has attracted considerable attention in the area of chemical and biological analysis. The most commonly used ionization technique in the chip–MS system is electrospray ionization (ESI). Traditional chip-based ESI devices mainly employ direct electrical contact between the electrode and the spray solvent. In this study, a microchip ESI source based on a novel polarization-splitting approach was developed. Specifically, the droplet in the microchannel is first polarized by the electric field and then split into two sub-droplets. In this process, the charge generated by polarization is retained in the liquid, resulting in the generation of two charged droplets with opposite polarities. Finally, when these charged droplets reach the emitter, the electrospray process is initiated and both positive and negative ions are formed from the same solution. Preliminary experimental results indicate that the coupling of this polarization-splitting ESI (PS-ESI) chip with a mass spectrometer enables conventional ESI-MS analysis of various analytes.

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Geometric optimization of toroidal ion trap based on electric field analysis and SIMION simulation

Cited by 3 publications

References 19 publications

Asymmetric rectilinear ion trap with unidirectional ion ejection capability

Asymmetric rectilinear ion trap with unidirectional ion ejection capability

Structures and infrared photodissociation of [(aniline)-(methanol)-(water)2]+

Fabricating an Electrospray Ionization Chip Based on Induced Polarization and Liquid Splitting

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