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Runaway electron beam formation, vertical motion, termination and wall loads in EU-DEMO

F. Vannini, V. Bandaru, H. Bergström, N. Schwarz, F.J. Artola, M. Hoelzl, G. Pautasso, E. Nardon, F. Maviglia, M.L. Richiusa2025年4月Nuclear FusionIF 3出版社

Runaway electron (RE) loads onto material structures are a major concern for future large tokamaks due to the efficient avalanching at high plasma currents. Here, we perform predictive numerical studies using the JOREK code for a plausible plasma configuration in the European DEMO fusion power plant, focusing in this paper on the scenario where the highest multi-ampere RE beam is formed. The work first comprises axisymmetric predictions of RE beam formation in a mitigated scenario and of the simultaneous vertical motion of the beam due to loss of position control. The subsequent RE beam termination triggered by a burst of magnetohydrodynamic (MHD) activity during the course of the vertical motion is then simulated in 3D with the RE fluid self-consistently coupled to the MHD modes. Finally, the resulting deposition pattern of the REs onto wall structures is calculated with a relativistic test particle approach. This way, the suitability of a possible sacrificial limiter concept for the protection of first wall components is assessed.

日本語訳

逃走電子(RE)の材料構造物への負荷は、高プラズマ電流での効率的なアバランシェのため、将来の大型トカマクにとって主要な懸念事項である。ここでは、欧州DEMO核融合発電所における妥当なプラズマ配位に対してJOREKコードを用いた予測的数値研究を実施し、本論文では、最大のマルチアンペアREビームが形成されるシナリオに焦点を当てる。この研究はまず、緩和シナリオにおけるREビーム形成と、位置制御の喪失によるビームの同時の垂直運動の軸対称予測を含む。続いて、垂直運動の過程で生じる磁気流体力学(MHD)活動のバーストによって引き起こされるREビームの終結を、MHDモードと自己無撞着に結合したRE流体を用いて3Dでシミュレーションする。最後に、壁構造物へのREの堆積パターンを、相対論的テスト粒子アプローチによって計算する。このようにして、第一壁構成要素の保護のための、考え得る犠牲リミター概念の適合性が評価される。

wiki

DEMOElectron beamsRunaway electronEU-DEMO

AIによる論文要約

EUデモ核融合炉における走行電子ビームの形成、垂直運動、終了、および壁への負荷
JAこの論文は、核融合炉の設計と安全性に興味のある研究者や学生に有益です。特に、走行電子ビームの動的挙動と壁への影響を理解したい人にお勧めです。#核融合炉 #走行電子ビーム #壁負荷 #MHD #安全性
LLM向け: {'Title': 'EUデモ核融合炉における走行電子ビームの動的挙動と壁への影響', 'Author(s)': '不明', 'Research Objecti…

この論文では、EUデモ核融合炉における走行電子ビームの予測的数値シミュレーションを行っています。走行電子ビームの形成、垂直運動、MHD活動による終了、および壁への負荷について詳しく分析しています。これにより、壁保護のための犠牲リミター概念の適合性を評価しています。

Formation, Vertical Motion, Termination, and Wall Loads of Runaway Electron Beams in EU-DEMO
ENThis paper is primarily targeted at fusion researchers and engineers working on the design and safety aspects of large tokamak devices, such as the European DEMO. It provides valuable insights into the complex behavior of runaway electron beams, which is a critical issue for the operation of future fusion power plants.#FusionSafety #RunawayElectrons #EuropeanDEMO #JOREKSimulations #WallProtection
LLM向け: {'Title': 'Formation, Vertical Motion, Termination, and Wall Loads of Runaway El…

This paper investigates the formation, vertical motion, termination, and wall loads of runaway electron (RE) beams in the European DEMO fusion power plant. The researchers use the JOREK code to simulate these phenomena, focusing on the scenario with the highest multi-ampere RE beam. The study covers the prediction of RE beam formation, its vertical motion due to loss of position control, the subsequent termination triggered by magnetohydrodynamic (MHD) activity, and the resulting deposition pattern on the wall structures. This information is crucial for assessing the suitability of a sacrificial limiter concept to protect the first wall components.

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