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Bogot A, Lioubashevski O, Heber O, Zajfman D, Strasser D. Simultaneous electrostatic trapping of merged cation & anion beams. Phys Chem Chem Phys 2023; 25:25701-25710. [PMID: 37721452 DOI: 10.1039/d3cp03633b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/19/2023]
Abstract
Simultaneous trapping of merged cation and anion beams in the hybrid electrostatic ion beam trap (HEIBT) opens new opportunities for the study of the interactions of isolated atomic molecular or cluster ions with oppositely charged ionic species. Application of the trapped merged beams requires a detailed understanding of the trapping dynamics and the effect of the Coulombic attractive and repulsive forces between the ions on their motion in the trap. The simultaneous trapping regime is explored experimentally for SF6- anion and SF5+ cation beams and compared to realistic ion trajectory simulations. The respective stability of the simultaneously trapped cation and anion beams is experimentally tracked by nondestructive and mass sensitive image charge monitoring. An approximate analytical potential model is presented for modeling the dynamics of trapped ions, providing insight into the role of ion-ion interactions, and suggesting a simplified mirror design.
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Affiliation(s)
- Alon Bogot
- The Hebrew University of Jerusalem, Institute of Chemistry, Jerusalem 91904, Israel.
| | - Oleg Lioubashevski
- The Hebrew University of Jerusalem, Institute of Chemistry, Jerusalem 91904, Israel.
| | - Oded Heber
- Weizmann Institute of Science, Department of Particle Physics and Astrophysics, Rehovot 7610001, Israel
| | - Daniel Zajfman
- Weizmann Institute of Science, Department of Particle Physics and Astrophysics, Rehovot 7610001, Israel
| | - Daniel Strasser
- The Hebrew University of Jerusalem, Institute of Chemistry, Jerusalem 91904, Israel.
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Gupta D, Sharma D, Ringle R, Nicoloff C, Rahinov I, Heber O, Zajfman D. Time-dependent dynamics of radio-frequency-bunched ions in an electrostatic ion beam trap. Phys Rev E 2023; 107:045202. [PMID: 37198764 DOI: 10.1103/physreve.107.045202] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2023] [Accepted: 04/02/2023] [Indexed: 05/19/2023]
Abstract
The dynamics of ions in an electrostatic ion beam trap in the presence of an external time-dependent field is studied with a recently developed particle-in-cell simulation technique. The simulation technique, capable of accounting for space-charge effects, has reproduced all the experimental results on the bunch dynamics in the radio frequency mode. With simulation, the motion of ions is visualized in phase space and it is shown that the ion-ion interaction strongly affects the distribution of ions in phase space in the presence of an rf driving voltage.
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Affiliation(s)
- Dhanoj Gupta
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Deepak Sharma
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Ryan Ringle
- Facility for Rare Isotope Beams, East Lansing, Michigan 48823, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48823, USA
| | - Catherine Nicoloff
- Facility for Rare Isotope Beams, East Lansing, Michigan 48823, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48823, USA
| | - Igor Rahinov
- Department of Natural Sciences, The Open University of Israel, Raanana 4353701, Israel
| | - Oded Heber
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Daniel Zajfman
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot 7610001, Israel
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Zhang X, Garimella SVB, Prost SA, Webb IK, Chen TC, Tang K, Tolmachev AV, Norheim RV, Baker ES, Anderson GA, Ibrahim YM, Smith RD. Ion Trapping, Storage, and Ejection in Structures for Lossless Ion Manipulations. Anal Chem 2015; 87:6010-6. [PMID: 25971536 DOI: 10.1021/acs.analchem.5b00214] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A new Structures for Lossless Ion Manipulations (SLIM) module, having electrode arrays patterned on a pair of parallel printed circuit boards (PCB), was constructed and utilized to investigate capabilities for ion trapping at a pressure of 4 Torr. Positive ions were confined by application of RF voltages to a series of inner rung electrodes with alternating phase on adjacent electrodes, in conjunction with positive DC potentials on surrounding guard electrodes on each PCB. An axial DC field was also introduced by stepwise varying the DC potentials applied to the inner rung electrodes to control the ion transport and accumulation inside the ion trapping region. We show that ions can be trapped and accumulated with up to 100% efficiency, stored for at least 5 h with no significant losses, and then could be rapidly ejected from the SLIM trap. The present results provide a foundation for the development of much more complex SLIM devices that facilitate extended ion manipulations.
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Affiliation(s)
- Xinyu Zhang
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Sandilya V B Garimella
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Spencer A Prost
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Ian K Webb
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Tsung-Chi Chen
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Keqi Tang
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Aleksey V Tolmachev
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Randolph V Norheim
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Erin S Baker
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Gordon A Anderson
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Yehia M Ibrahim
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Richard D Smith
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
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Rahinov I, Toker Y, Heber O, Strasser D, Rappaport M, Schwalm D, Zajfman D. Lifetime measurements in an electrostatic ion beam trap using image charge monitoring. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2012; 83:033302. [PMID: 22462914 DOI: 10.1063/1.3694997] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A technique for mass-selective lifetime measurements of keV ions in a linear electrostatic ion beam trap is presented. The technique is based on bunching the ions using a weak RF potential and non-destructive ion detection by a pick-up electrode. This method has no mass-limitation, possesses the advantage of inherent mass-selectivity, and offers a possibility of measuring simultaneously the lifetimes of different ion species with no need for prior mass-selection.
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Affiliation(s)
- Igor Rahinov
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, 76100 Rehovot, Israel.
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Villalta PW, Leopold DG. A study of the ground and excited states of Al3 and Al3−. I. 488 nm anion photoelectron spectrum. J Chem Phys 2009; 130:024303. [DOI: 10.1063/1.2973625] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
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Guliamov O, Kronik L, Martin JML. Polarizability of Small Carbon Cluster Anions from First Principles. J Phys Chem A 2007; 111:2028-32. [PMID: 17388282 DOI: 10.1021/jp068443y] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We examine the applicability of density functional theory (DFT) to the polarizability of Cn- (n = 3-9) cluster anions. This was achieved by comparing DFT calculations using two different exchange-correlation functionals (the non-empirical local density approximation, LDA, and the semiempirical hybrid functional B97-1) to quantum chemical calculations using the coupled cluster method in the CCSD(T) "gold standard" approximation. We find that, unless the extra electron is not bound at all by DFT, both LDA and B97-1 agree with the CCSD(T) calculation to within 5-10%, allowing for a meaningful qualitative and semiquantitative analysis. Furthermore, the polarizability is found to increase monotonically with chain size, consistent with the trend inferred from electron detachment experiments.
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Affiliation(s)
- Olga Guliamov
- Department of Materials and Interfaces, Weizmann Institute of Science, Rehovoth 76100, Israel
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El Ghazaly MO, Svendsen A, Bluhme H, Nielsen SB, Andersen LH. Electron scattering on p-benzoquinone anions. Chem Phys Lett 2005. [DOI: 10.1016/j.cplett.2005.02.048] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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