Abstract Details
Abstracts
Author: Enac Gallardo-Diaz
Requested Type: Poster
Submitted: 2026-03-18 17:16:29
Co-authors: A. J. C. Singor, J. Kasper, C. J. Fontes, J. Colgan, C. Huang, X. Tang, M. Zammit
Contact Info:
LANL
3200 canyon rd 5104
los alamos, NM 87544
US
Abstract Text:
Accurately modeling the molecular activated recombination processes in a tokamak’s divertor and plasma recombination regions is critical to properly quantifying plasma power-exhaust. Previous collisional-radiative (CR) models have used a combination of limited number of molecular processes (due to limited cross section information in the literature), neglected the atomic and molecular processes and/or used approximations to simulate the population distribution and radiative cooling of the plasma. This work shows a new state-of-the-art Collisional-Radiative Atomic and Molecular Kinetics (CRAM-K) code that includes the coupling between the atomic and molecular processes and their excited states, which improves upon previous codes. This code uses detailed balance relations for the atomic and molecular processes, an approximate ro-vibrational hybrid scheme, and vibrationally resolved cross sections calculated with a convergent close-coupling (CCC)[1,2,3] code and LANL’s atomic[4] and molecular[5,6] suite of codes. We show CRAM-K results for the first time, validating the code through reproduction of the local thermodynamic equilibrium (LTE) and coronal limits, demonstrating physical consistency.
This work was supported by LDRD program at Los Alamos National Laboratory. LA-UR-26-22159
[1] M. C Zammit et al, JPB 50, 123001(2017)
[2] I. Bray et al, JPB 50, 202001 (2017)
[3] L. H. Scarlett et al, ADNDT 137, 101361 (2021)
[4] C.J. Fontes et al, JPB 48, 144014 (2015)
[5] M. C. Zammit et al, JPB 55, 184002 (2022)
[6] M. C Zammit et al, "GEC Early Career Award: Development of Collision Models and Data Through to Applications in Plasma Modeling" APS Gaseous Electronics Conference (2023)
Characterization: 4.0
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