Electron Capture and Ionisation in Collisions of Ne10+ and Li3+ with Atomic Hydrogen

Kotian, Aks M.; Plowman, C. T.; Abdurakhmanov, Ilkhom; Bray, Igor; Kadyrov, Alisher

doi:10.3390/atoms10040144

Cited by 3 publications

(1 citation statement)

References 35 publications

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“…The WP-CCC method has been applied to a number of collision systems. Results convergent with regard to parameters n max , l max and N c have been published in [36][37][38][39][40][42][43][44][45][46][47][48][49][50][51][52][53].…”

Section: Ctmcmentioning

confidence: 99%

Atomic collisional data for neutral beam modeling in fusion plasmas

Hill,

Dipti,

Heinola

et al. 2023

Nucl. Fusion

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The injection of energetic neutral particles into the plasma of magnetic confinement fusion reactors is a widely-accepted method for heating such plasmas; various types of neutral beam are also used for diagnostic purposes. Accurate atomic data are required to properly model beam penetration into the plasma and to interpret photoemission spectra from both the beam particles themselves and from plasma impurities with which they interact. This paper reviews and compares theoretical methods for calculating ionization, excitation and charge exchange cross sections applied to several important processes relevant to neutral hydrogen beams, including H + Be4+ and H + H+. In particular, a new cross section for the proton-impact ionization of H (1s) is recommended which is significantly larger than that previously accepted at fusion-relevant energies. Coefficients for an empirical fit function to this cross section and to that of the first excited states of H are provided and uncertainties estimated. The propagation of uncertainties in this cross section in modeling codes under JET-like conditions has been studied and the newly-recommended values determined to have a significant effect on the predicted beam attenuation. In addition to accurate calculations of collisional atomic data, the use of these data in codes modeling beam penetration and photoemission for fusion-relevant plasma density and temperature profiles is discussed. In particular, the discrepancies in the modelling of impurities are reported.The present paper originates from a Coordinated Research Project (CRP) on the topic of fundamental atomic data for neutral beam modeling that the International Atomic Energy Agency (IAEA) ran from 2017 – 2022; this project brought together 10 research groups in the fields of fusion plasma modeling and collisional cross section calculations. Data calculated during the CRP is summarized in an Appendix and is available online in the IAEA's atomic database, CollisionDB.

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Section: Ctmcmentioning

confidence: 99%

Atomic collisional data for neutral beam modeling in fusion plasmas

Hill,

Dipti,

Heinola

et al. 2023

Nucl. Fusion

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Calculations of the integrated cross sections in dressed carbon-ion collisions with atomic hydrogen

Antonio,

Plowman,

Abdurakhmanov

et al. 2024

Phys. Rev. A

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Electron capture and ionisation in He$$^{2+}$$ collisions with H$$_2$$

Kotian,

Plowman,

Kadyrov

2023

Eur. Phys. J. D

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State-selective non-dissociative electron capture and ionisation cross sections are calculated for collisions between bare helium-ions and molecular hydrogen. The two-centre wave-packet convergent close-coupling approach is used and the hydrogen molecule is represented as an effective one-electron target. For the electron-capture cross section, our results are in good agreement with experimental measurements at energies above 100 keV/u. However, near the peak of the cross section, they are larger than the experimental data. The total ionisation cross section is also in good agreement with experiment, particularly at low and high energies. The results for the state-selective electron-capture cross section are generally in good agreement with the limited experimental measurements. However, we find that our results appear to consistently overestimate the experimental data for electron capture into the s states at intermediate energies. The present results are the first calculations capable of producing electron capture and ionisation cross sections over a wide incident energy range within a single unified theoretical framework. Graphical Abstract

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Electron Capture and Ionisation in Collisions of Ne10+ and Li3+ with Atomic Hydrogen

Cited by 3 publications

References 35 publications

Atomic collisional data for neutral beam modeling in fusion plasmas

Atomic collisional data for neutral beam modeling in fusion plasmas

Calculations of the integrated cross sections in dressed carbon-ion collisions with atomic hydrogen

Electron capture and ionisation in He$$^{2+}$$ collisions with H$$_2$$

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