Demonstrating the impact of ro-vibrationally excited H2 on divertor detachment via population modelling

Bergmayr, Richard C.; Wünderlich, Dirk; Groth, Mathias; Scarlett, Liam H.; Fursa, Dmitry V.; Zammit, Mark Christian; Bray, Igor; Fantz, Ursel

doi:10.1016/j.nme.2025.101895

Demonstrating the impact of ro-vibrationally excited H₂ on divertor detachment via population modelling

Journal Article · Mon Feb 10 00:00:00 EST 2025 · Nuclear Materials and Energy

DOI:https://doi.org/10.1016/j.nme.2025.101895· OSTI ID:2520091

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Max Planck Institute for Plasma Physics, Garching (Germany)
Aalto Univ., Espoo (Finland)
Curtin Univ., Perth, WA (Australia)
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

EDGE2D-EIRENE profiles characteristic for low recycling, high recycling and detached plasmas are postprocessed applying a vibrationally resolved collisional radiative (CR) model based on the Yacora solver to predict excited state densities and thus the molecular Lyman-, Werner- and Fulcher band emission intensities. These emission intensities are compared to predictions from the AMJUEL database standardly used in EIRENE. Lower Fulcher band and higher Lyman- and Werner band emission is predicted by the Yacora model in comparison to AMJUEL suggesting that inconsistent results from model based evaluation of measured spectra are expected depending on which model and molecular emission band is considered. The implications on detachment rate predictions are discussed.

View Accepted Manuscript (DOE)

Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE Laboratory Directed Research and Development (LDRD) Program

Grant/Contract Number:: 89233218CNA000001

OSTI ID:: 2520091

Report Number(s):: LA-UR--24-25993

Journal Information:: Nuclear Materials and Energy, Journal Name: Nuclear Materials and Energy Vol. 42; ISSN 2352-1791

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Demonstrating the impact of ro-vibrationally excited H2 on divertor detachment via population modelling

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Demonstrating the impact of ro-vibrationally excited H₂ on divertor detachment via population modelling