Time profiles of ions produced in a hot-cavity resonant ionization laser ion source

Y. Liu; C. Baktash; J. R. Beene; C. C. Havener; H. F. Krause; D. R. Schultz; D. W. Stracener; C. R. Vane; Ch Geppert; T. Kessler; K. Wies; K. Wendt

doi:10.1016/j.nimb.2011.08.009

Time profiles of ions produced in a hot-cavity resonant ionization laser ion source

Y. Liu
, C. Baktash
, J. R. Beene
, C. C. Havener
, H. F. Krause
, D. R. Schultz
, D. W. Stracener
, C. R. Vane
, Ch Geppert
, T. Kessler
, K. Wies
, K. Wendt

Medical Isotopes and Development

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

The time profiles of Cu, Sn, and Ni ions extracted from a hot-cavity resonant ionization laser ion source are investigated. The ions are produced in the ion source by three-photon resonant ionization with pulsed Ti:Sapphire lasers. Measurements show that the time spread of these ions generated within laser pulses of about 30 ns duration could be larger than 100 μs when the ions are extracted from the ion source. A one-dimensional ion-transport model using the Monte Carlo method is developed to simulate the time dependence of the ion pulses. The prediction of the model agrees reasonably well with the experimental data. To reproduce the observed ion time profiles, we find it necessary to postulate that ion-wall collisions are suppressed inside the ion source by an undetermined ion confinement mechanism and that a substantial fraction of the extracted ions are generated in the vapor-transfer tube rather than the hot cavity. Three-dimensional modeling will be necessary to understand the strong reduction in losses expected from ion-wall collisions which we interpret as evidence for confinement.

Original language	English
Pages (from-to)	2771-2780
Number of pages	10
Journal	Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume	269
Issue number	23
DOIs	https://doi.org/10.1016/j.nimb.2011.08.009
State	Published - Dec 1 2011

Funding

This work has been supported by the Office of Nuclear Physics, and in part by the Office of Fusion Energy and the Division of Chemical Sciences, Geosciences, and Biosciences, Office of Basic Energy Sciences, US Department of Energy and the Deutsches Bundeministerium für Bildung und Forschung under Grant 06MZ215 .

Keywords

Hot cavity
Laser ion source
Resonant ionization
Time profile

Access to Document

10.1016/j.nimb.2011.08.009

Cite this

Liu, Y., Baktash, C., Beene, J. R., Havener, C. C., Krause, H. F., Schultz, D. R., Stracener, D. W., Vane, C. R., Geppert, C., Kessler, T., Wies, K., & Wendt, K. (2011). Time profiles of ions produced in a hot-cavity resonant ionization laser ion source. Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, 269(23), 2771-2780. https://doi.org/10.1016/j.nimb.2011.08.009

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title = "Time profiles of ions produced in a hot-cavity resonant ionization laser ion source",

abstract = "The time profiles of Cu, Sn, and Ni ions extracted from a hot-cavity resonant ionization laser ion source are investigated. The ions are produced in the ion source by three-photon resonant ionization with pulsed Ti:Sapphire lasers. Measurements show that the time spread of these ions generated within laser pulses of about 30 ns duration could be larger than 100 μs when the ions are extracted from the ion source. A one-dimensional ion-transport model using the Monte Carlo method is developed to simulate the time dependence of the ion pulses. The prediction of the model agrees reasonably well with the experimental data. To reproduce the observed ion time profiles, we find it necessary to postulate that ion-wall collisions are suppressed inside the ion source by an undetermined ion confinement mechanism and that a substantial fraction of the extracted ions are generated in the vapor-transfer tube rather than the hot cavity. Three-dimensional modeling will be necessary to understand the strong reduction in losses expected from ion-wall collisions which we interpret as evidence for confinement.",

keywords = "Hot cavity, Laser ion source, Resonant ionization, Time profile",

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Liu, Y, Baktash, C, Beene, JR, Havener, CC, Krause, HF, Schultz, DR, Stracener, DW, Vane, CR, Geppert, C, Kessler, T, Wies, K & Wendt, K 2011, 'Time profiles of ions produced in a hot-cavity resonant ionization laser ion source', Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, vol. 269, no. 23, pp. 2771-2780. https://doi.org/10.1016/j.nimb.2011.08.009

TY - JOUR

T1 - Time profiles of ions produced in a hot-cavity resonant ionization laser ion source

AU - Liu, Y.

AU - Baktash, C.

AU - Beene, J. R.

AU - Havener, C. C.

AU - Krause, H. F.

AU - Schultz, D. R.

AU - Stracener, D. W.

AU - Vane, C. R.

AU - Geppert, Ch

AU - Kessler, T.

AU - Wies, K.

AU - Wendt, K.

PY - 2011/12/1

Y1 - 2011/12/1

N2 - The time profiles of Cu, Sn, and Ni ions extracted from a hot-cavity resonant ionization laser ion source are investigated. The ions are produced in the ion source by three-photon resonant ionization with pulsed Ti:Sapphire lasers. Measurements show that the time spread of these ions generated within laser pulses of about 30 ns duration could be larger than 100 μs when the ions are extracted from the ion source. A one-dimensional ion-transport model using the Monte Carlo method is developed to simulate the time dependence of the ion pulses. The prediction of the model agrees reasonably well with the experimental data. To reproduce the observed ion time profiles, we find it necessary to postulate that ion-wall collisions are suppressed inside the ion source by an undetermined ion confinement mechanism and that a substantial fraction of the extracted ions are generated in the vapor-transfer tube rather than the hot cavity. Three-dimensional modeling will be necessary to understand the strong reduction in losses expected from ion-wall collisions which we interpret as evidence for confinement.

AB - The time profiles of Cu, Sn, and Ni ions extracted from a hot-cavity resonant ionization laser ion source are investigated. The ions are produced in the ion source by three-photon resonant ionization with pulsed Ti:Sapphire lasers. Measurements show that the time spread of these ions generated within laser pulses of about 30 ns duration could be larger than 100 μs when the ions are extracted from the ion source. A one-dimensional ion-transport model using the Monte Carlo method is developed to simulate the time dependence of the ion pulses. The prediction of the model agrees reasonably well with the experimental data. To reproduce the observed ion time profiles, we find it necessary to postulate that ion-wall collisions are suppressed inside the ion source by an undetermined ion confinement mechanism and that a substantial fraction of the extracted ions are generated in the vapor-transfer tube rather than the hot cavity. Three-dimensional modeling will be necessary to understand the strong reduction in losses expected from ion-wall collisions which we interpret as evidence for confinement.

KW - Hot cavity

KW - Laser ion source

KW - Resonant ionization

KW - Time profile

UR - https://www.scopus.com/pages/publications/80053360755

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DO - 10.1016/j.nimb.2011.08.009

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JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

IS - 23

ER -

Time profiles of ions produced in a hot-cavity resonant ionization laser ion source

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Keywords

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