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Heuristic predictions of RMP configurations for ELM suppression in ITER burning plasmas and their impact on divertor performance

H. Frerichs, J. van Blarcum, Y. Feng, L. Li, Y.Q. Liu, A. Loarte, J-K. Park, R.A. Pitts, O. Schmitz, S.M. Yang2024年7月Nuclear FusionIF 3出版社

A subspace of resonant magnetic perturbation (RMP) configurations for edge localized mode (ELM) suppression is predicted for H-mode burning plasmas at 15 MA current and 5.3 T magnetic field in ITER. Perturbations to the core plasma can be reduced by a factor of 2 for equivalent edge stability proxies, while the perturbed plasma boundary geometry remains mostly resilient. The striated domain of perturbed field lines connecting from the main plasma (normalized poloidal flux ) to the divertor targets is found to be significantly larger than the expected heat load width in the absence of RMPs. This facilitates heat load spreading with peak values at an acceptable level below on the outer target already at moderate gas fueling and low Ne seeding for additional radiative dissipation of the of power into the scrape-off layer (SOL). On the inner target, however, re-attachment is predicted away from the equilibrium strike point due to increased upstream heat flux, higher downstream temperature and less efficient impurity radiation.

日本語訳

ELM抑制のための共鳴磁場摂動(RMP)配位の部分空間が、ITERにおける15 MA電流・5.3 T磁場のHモード燃焼プラズマに対して予測される。等価な周辺安定性プロキシに対して、コアプラズマへの摂動は2倍に低減でき、一方で摂動されたプラズマ境界形状はほぼ頑健に保たれる。主プラズマ(規格化ポロイダル磁束 )からダイバータ標的へ接続する摂動磁力線の縞状領域は、RMPがない場合の予想熱負荷幅よりも有意に大きいことが見いだされる。これにより、熱負荷の拡散が促進され、外側標的では、適度なガス燃料供給と、スクレイプオフ層(SOL)への のパワーの追加的輻射散逸のための低Neシーディングにより、ピーク値は許容可能なレベルである 未満に既に達する。しかし内側標的では、上流熱流束の増加、下流温度の上昇、不純物輻射の効率低下により、平衡ストライク点から離れた位置での再付着が予測される。

装置

iter高精度(タイトル一致)

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ITERDivertorEdge localized modeResonant magnetic perturbationBurning plasma

AIによる論文要約

ELMの抑制のためのRMPの最適化と ITER 燃焼プラズマにおけるダイバータ性能への影響
JAこの論文は、ITER のプラズマ制御や、ダイバータ設計に携わる研究者や技術者に有用です。特に、ELM 抑制と熱負荷軽減のための RMP 最適化に興味のある方に向けて書かれています。#ITER #ELM_suppression #RMP_optimization #divertor_performance

この論文では、ITER の 15 MA、5.3 T の H モードプラズマにおける ELM 抑制のための最適な共鳴磁気摂動(RMP)の構成を予測しています。コアプラズマへの影響を最小限に抑えつつ、ダイバータ領域への熱負荷を低減できる RMP 構成を見出しています。これにより、ガス注入や不純物注入によるさらなる放射損失で、ダイバータ熱負荷を許容範囲内に抑えられることが示されています。

Heuristic predictions of RMP configurations for ELM suppression in ITER burning plasmas and their impact on divertor performance
ENThis paper should be read by fusion researchers and engineers working on plasma control and divertor design for ITER and other future fusion reactors. It provides valuable insights into the complex interplay between plasma stability, heat loads, and divertor performance under the influence of RMPs.#ITERPlasmaControl #ELMSuppression #DivertorPerformance #FusionResearch

This paper explores the use of resonant magnetic perturbations (RMPs) to suppress edge-localized modes (ELMs) in ITER's high-power fusion plasmas. It predicts a range of RMP configurations that can reduce core plasma disturbance while maintaining edge stability. The study also investigates the impact of these RMPs on the divertor, finding that they can spread the heat load and keep it at an acceptable level.

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