SOLEDGE3X full vessel plasma boundary simulations of ITER non-active phase plasmas

Rivals, N.; Tamain, P.; Marandet, Y.; Bonnin, X.; Park, J. -S.; Bufferand, H.; Pitts, R. A.; Falchetto, G.; Yang, H.; Ciraolo, G.

doi:10.1088/1741-4326/ada2a8

Title: SOLEDGE3X full vessel plasma boundary simulations of ITER non-active phase plasmas

Journal Article · 10 January 2025 · Nuclear Fusion

DOI: https://doi.org/10.1088/1741-4326/ada2a8 · OSTI ID:2502149

^[1]; Tamain, P. ^[2];

^[3]; Bonnin, X. ^[4];

^[5];

^[2];

^[4]; Falchetto, G. ^[2];

^[2]; Ciraolo, G. ^[2]

CEA, IRFM, Saint Paul Lez Durance (France); Aix-Marseille Univ., Marseille (France)
CEA, IRFM, Saint Paul Lez Durance (France)
Aix-Marseille Univ., Marseille (France)
ITER Organization, St. Paul Lez Durance (France)
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

The onset of detachment in the ITER machine is analyzed in this work through the help of 2D-axisymmetric boundary plasma simulations with the SOLEDGE3X-EIRENE code, which features a numerical domain for the plasma solver extending up to the first wall. The plasma boundary is computed in scenarios from the first non-active phase of ITER, in pure H and at 20 MW. This set of simulations is used in two aspects: first, to study the plasma detachment in the divertor, and second, the plasma conditions, fluxes, and beryllium erosion at the first wall. Here, the code results are also compared to those obtained with the well-established SOLPS-ITER code, which includes a plasma numerical domain only covering the main SOL. Results show an increase in the SOL width λ_q with increasing density, and a detailed analysis is carried out, for the first time, on each of the different plasma-neutral interactions in the code’s physics model in EIRENE. The gross beryllium erosion rates of first wall panels are estimated from 2D simulations, with the aim of assessing their sensitivity to two parameters: the divertor density regime, and the presence of density shoulders in the far-SOL formed by enhanced perpendicular transport at this location. The erosion contributions from neutrals and ions are considered in each case, and the charge-exchange atoms fluxes and energy distributions are provided, highlighting the two atom populations (cold and charge-exchange).

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: EUROfusion; ITER Organization; USDOE Office of Science (SC)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 2502149

Journal Information:: Nuclear Fusion, Journal Name: Nuclear Fusion Journal Issue: 2 Vol. 65; ISSN 0029-5515

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

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Title: SOLEDGE3X full vessel plasma boundary simulations of ITER non-active phase plasmas

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