Research on atomic structure and collision cross-sections for spectroscopic modeling in KAERI Atomic Data Center

Kwon, Duck-Hee; Chai, Kil-Byoung

doi:10.1007/s40042-023-00771-4

Cited by 1 publication

(1 citation statement)

References 41 publications

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“…CollisionDB [136] is a database of plasma collisional processes developed at the IAEA to provide access to atomic and molecular (A + M) data relevant for fusion research and development. In practice, there are several existing databases [137][138][139] that aim to provide such data for different communities, including the IAEA's ALADDIN (A Labeled Atomic Data INterface) database [140]. However, these data services contain a limited amount of data concerning state-resolved collisions and do not expose an Application Programming Interface (API) for obtaining data from modeling codes in a standardized way; this functionality is provided by CollisionDB.…”

Section: Storing and Transmitting Fundamental Collisional Data: Colli...mentioning

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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