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Exploring the effect of ELM and code-coupling frequencies on plasma and material modeling of dynamic recycling in divertors

A. Lasa, J.-S. Park, J. Lore, S. Blondel, D.E. Bernholdt, J.M. Canik, M. Cianciosa, J. Coburn, D. Curreli, W. Elwasif2024年7月Nuclear FusionIF 3出版社

Integrated modeling of plasma-surface interactions provides a comprehensive and self-consistent description of the system, moving the field closer to developing predictive and design capabilities for plasma facing components. One such workflow, including descriptions for the scrape-off-layer plasma, ion-surface interactions and the sub-surface evolution, was previously used to address steady-state scenarios and has recently been extended to incorporate time-dependence and two-way information flow. The new model can address dynamic recycling in transient scenarios, such as the application presented in this paper: the evolution of W samples pre-damaged by helium and exposed to ELMy H-mode plasmas in the DIII-D DiMES. A first set of simulations explored the effect of ELM frequency. This study was discussed in detail in this conference's proceedings and is summarized here. The 2nd set of simulations, which is the focus of this paper, explores the effect of code-coupling frequency. These simulations include initial SOLPS solutions converged to the inter-ELM state, ion impact energy (Ein) and angles (Ain) calculated by hPIC2, and an improved heat transfer description in Xolotl. The model predicts increases in particle fluxes and decreases in heat fluxes by 10%–20% with the coupling time-step. Compared with the first set of simulations, the less shallow impact angle leads to smaller reflection rates and significant D implantation. The higher fraction of implanted flux (and deeper), in particular during ELMs, increases the accumulated D content in the W near-surface region. Future expansion of the workflow includes coupling to hPIC2 and GITR to ensure accurate descriptions of Ein and Ain, and W impurity transport.

装置

diii-d中精度(概要文一致)

wiki

Edge localized modeRecycling

AIによる論文要約

ELMとコードカップリング周波数がダイナミックリサイクリングにおける プラズマとマテリアルモデリングに及ぼす影響の探索
JAこの論文は、プラズマ表面相互作用のモデリングに興味のある研究者や学生に向けて書かれています。プラズマ対向部品の設計や予測に役立つ知見が得られるでしょう。#PlasmaSurfaceInteraction #DynamicRecycling #ELMFrequency #CodeCoupling

この論文では、プラズマ表面相互作用のモデリングを通じて、プラズマ対向部品の予測と設計能力を高めることを目的としています。特に、ELM周波数とコードカップリング周波数がダイナミックリサイクリングに及ぼす影響を検討しています。シミュレーションの結果、コードカップリング周波数の増加により、粒子フラックスが10-20%増加し、熱フラックスが減少することが分かりました。また、入射角の減少により反射率が小さくなり、Dの蓄積量が増加することも示されています。

Exploring the effect of ELM and code-coupling frequencies on plasma and material modeling of dynamic recycling in divertors
ENThis paper is of interest to fusion researchers working on plasma-material interactions, divertor design, and integrated modeling of fusion systems. It provides insights that can help improve the predictive capabilities of these simulations, which are crucial for the development of fusion reactors.#FusionResearch #PlasmaMatInteractions #DivertorDesign #IntegratedModeling

This paper explores how the frequency of edge-localized modes (ELMs) and the frequency of coupling between different simulation codes affect the modeling of dynamic recycling in fusion reactor divertors. The model predicts changes in particle and heat fluxes, as well as increased deuterium implantation in the tungsten surface, as the coupling frequency is varied. The study aims to improve the accuracy of integrated plasma-material interaction simulations for fusion reactor design.

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