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Experimental and numerical investigations of under-expanded gas flows for optimal operation of a novel multipole differential ion mobility filter in the first vacuum-stage of a mass spectrometer

Papanastasiou Dimitris, Kounadis Diamantis, Orfanopoulos Ioannis, Lekkas Alexandros, Zacharos Athanasios, Raptakis Emmanuel N., Gini Maria I., Eleftheriadis Konstantinos, Nikolos Ioannis

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URIhttp://purl.tuc.gr/dl/dias/EE684706-2C3C-4449-B3A4-AF92C3F2706E-
Identifierhttps://doi.org/10.1016/j.ijms.2021.116605-
Identifierhttps://www.sciencedirect.com/science/article/pii/S1387380621000853-
Languageen-
Extent11 pagesen
TitleExperimental and numerical investigations of under-expanded gas flows for optimal operation of a novel multipole differential ion mobility filter in the first vacuum-stage of a mass spectrometeren
CreatorPapanastasiou Dimitrisen
CreatorKounadis Diamantisen
CreatorOrfanopoulos Ioannisen
CreatorLekkas Alexandrosen
CreatorZacharos Athanasiosen
CreatorRaptakis Emmanuel N.en
CreatorGini Maria I.en
CreatorEleftheriadis Konstantinosen
CreatorNikolos Ioannisen
CreatorΝικολος Ιωαννηςel
PublisherElsevieren
Content SummaryThe integration process of a higher-order multipole differential mobility spectrometer in the first vacuum stage of a mass spectrometer is described and separation of ions under the influence of a pair of antiphase asymmetric rectangular RF waveforms is demonstrated experimentally. The superposition of quadrupole RF and DC components to the main dipole field is investigated and directional focusing of ions controlled via adjustments in the electrical potentials applied to the pole-electrodes is accomplished. The requirement for laminar flow to minimize perturbations on the oscillatory motion of the ions inside the separation field of the differential mobility spectrometer is obtained by incorporating a carefully dimensioned duct to confine the free jet expansion and suppress turbulence typically observed in the far-field region of the expanding flow. The transitions of the flow and relaminarization effects established within the duct are visualized by particle tracking velocimetry. Monodisperse and polydisperse nanoparticles produced by spark discharge are employed as tracers to visualize the gas dynamic effects at low pressure. Particle tracking velocimetry is extended to free jets and experimental data are contrasted to numerical solutions of the flow to understand time relaxation effects of particles and evaluate the applicability of numerical methods at low pressure.en
Type of ItemPeer-Reviewed Journal Publicationen
Type of ItemΔημοσίευση σε Περιοδικό με Κριτέςel
Licensehttp://creativecommons.org/licenses/by/4.0/en
Date of Item2022-12-19-
Date of Publication2021-
SubjectDifferential mobility spectrometryen
SubjectMultipoleen
SubjectLow pressureen
SubjectParticle tracking velocimetryen
SubjectFree jet laminarizationen
Bibliographic CitationD. Papanastasiou, D. Kounadis, I. Orfanopoulos, A. Lekkas, A. Zacharos, E. Raptakis, M.I. Gini, K. Eleftheriadis, and I.N. Nikolos, “Experimental and numerical investigations of under-expanded gas flows for optimal operation of a novel multipole differential ion mobility filter in the first vacuum-stage of a mass spectrometer,” Int. J. Mass Spectrom., vol. 465, July 2021, doi: 10.1016/j.ijms.2021.116605.en

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