دورية أكاديمية
Study of the erosion and redeposition of W considering the kinetic energy distribution of incident ions through a semi-analytical model
| العنوان: | Study of the erosion and redeposition of W considering the kinetic energy distribution of incident ions through a semi-analytical model |
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| المؤلفون: | Cappelli, L., Fedorczak, N., Gunn, J., P., Di Genova, S., Guterl, J., Serre, E. |
| المساهمون: | Laboratoire de Mécanique, Modélisation et Procédés Propres (M2P2), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherche sur la Fusion par confinement Magnétique (IRFM), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), General Atomics, San Deigo, CA, United States of America, ANR-19-CE46-0005,SISTEM,Simulations par schémas d'ordre élevé du transport et de la turbulence dans un tokamak(2019), ANR-11-IDEX-0001,Amidex,INITIATIVE D'EXCELLENCE AIX MARSEILLE UNIVERSITE(2011), European Project: 101052200,Implementation of activities described in the Roadmap to Fusion during Horizon Europe through a joint programme of the members of the EUROfusion consortium,EUROfusion |
| المصدر: | ISSN: 0741-3335. |
| بيانات النشر: | HAL CCSD IOP Publishing |
| سنة النشر: | 2023 |
| المجموعة: | Aix-Marseille Université: HAL |
| مصطلحات موضوعية: | net sources, plasma-wall interactions, tungsten, erosion, redeposition, kinetic distributions, Monte Carlo, [SPI]Engineering Sciences [physics] |
| الوصف: | International audience ; In today’s nuclear fusion devices, erosion of high-Z metallic plasma-facing materials (PFMs) is mainly caused by physical sputtering. That is, by the exchange of energy between plasma ions and the atoms in the walls. In most of the numerical codes currently in use impinging plasma is approximated as a fluid. By averaging the incident particles’ energy distribution the high-energy population of the eroded material is underestimated. For heavy materials such as W, high-energy eroded particles tend to ionize far from the wall and they are less affected by the sheath electric field hence, not being attracted back to the wall, they have a higher chance to contaminate the core plasma. This could in turn result in an underestimation of the net erosion sources. In this work, a semi-analytical model was developed to include the energy distribution of the incident particles. Then, by Monte Carlo method, the net erosion of tungsten from a smooth PFM was calculated. The results show that the kinetic description in energy is important only for incident particles ionized once. For instance, it is particularly important for plasma ions such as Deuterium. It is seen that Deuterium contribution to the W net sources is not always negligible if compared to light impurities or to tungsten self-sputtering in the range of plasma parameters tested. Finally, results show that the difference between the fluid and kinetic models becomes more pronounced for high-screening plasma conditions. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| العلاقة: | info:eu-repo/grantAgreement//101052200/EU/EUROfusion/EUROfusion; hal-04190861; https://hal.science/hal-04190861Test; https://hal.science/hal-04190861/documentTest; https://hal.science/hal-04190861/file/Cappelli-MANUSCRIPT_revised_and_accepted-2023.pdfTest |
| DOI: | 10.1088/1361-6587/ace282 |
| الإتاحة: | https://doi.org/10.1088/1361-6587/ace282Test https://hal.science/hal-04190861Test https://hal.science/hal-04190861/documentTest https://hal.science/hal-04190861/file/Cappelli-MANUSCRIPT_revised_and_accepted-2023.pdfTest |
| حقوق: | info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.56A91756 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1088/1361-6587/ace282 |
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