Monte-Carlo simulation of complex vapor-transport systems for RIB applications

Zhang, Y.; Alton, G.D.

doi:10.1016/j.nimb.2005.07.154

Cited by 5 publications

(2 citation statements)

References 7 publications

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“…It was shown that the formula obtained for a spherical cavity [11] describes well simulation results obtained for a tubular ionizer [12]. However, only a few attempts have been made to describe processes (as vapor transport from an irradiated target to the ionizer [13] or release curves dependence on the ionizer's geometry [14]) in the hot cavity surface ionization sources by means of computer simulations.…”

Section: Introductionmentioning

confidence: 78%

Modeling of Ionization in a Spherical Surface Ionizer

Turek

2011

Acta Phys. Pol. A

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A Monte Carlo method-based model of a hot cavity surface ion source with a spherically shaped ionizer is presented. A numerical code enables studies of ion source efficiency as a function of an extraction voltage, geometry of the ionizer and its temperature, the size of extraction aperture and many other factors. The calculation results for a variety of mentioned parameters are presented. A novel configuration of surface ion source is proposed and discussed -the efficiency of the source with an almost spherically shaped ionizer could be much higher than that of currently used constructions of ion sources.

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Section: Introductionmentioning

confidence: 78%

Modeling of Ionization in a Spherical Surface Ionizer

Turek

2011

Acta Phys. Pol. A

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“…Several attempts have been made to describe the processes taking place in hot cavity ion sources using computer modelling, especially those based on the Monte Carlo methods. Some of them focused on thermal ionization in the hot cavity [11,22,23], describing the crucial effect of multiple collisions with the walls of the hot cavity, while other papers presented issues such as vapour transport from the bombarded target to the ionizer [24,25] or the release of nuclides from the walls of the ionizer [26,27]. Various shapes of ionizers were considered in the literature; the most popular being tubular [23,[28][29][30], rarely employed spherical or hemispherical [31][32][33], but also conical [34][35][36], and even the most exotic, resembling a kind of mace with spikes [22].…”

Section: Introductionmentioning

confidence: 99%

Ionization in Hot Cavity Ion Sources

Turek

2022

Acta Phys. Pol. A

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A theoretical model of ionization and ion extraction in hot cavity ion sources is presented. The model enables the calculation of the total ionization efficiency in the hot cavity, as well as to study changes in the number of ions and neutral particles inside the cavity. A general formula describing the evolution of the system is derived -which could be especially useful for fast numerical calculations. Examples of calculation results are presented and discussed, showing that high ionization efficiencies (significantly exceeding the predictions of the Saha-Langmuir formula) can be achieved especially for small extraction openings. An alternative (to the ion and neutral numbers) description of the system has been proposed in terms of the total number of particles and the difference between the neutrals and the ions, which in some cases makes understanding the dynamics of the system much easier. The possibilities of the model are illustrated considering four special cases: closed cavity, cold cavity, and the cases of weak extraction and super-efficient extraction ("each ion" mode). The theoretical formulae enabling total ionization efficiency for the two latter cases are derived in the paper, and their predictions are compared to the results of numerical calculations.

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