Simulation of the plasma-wall interaction in a tokamak with the Monte Carlo code ERO-TEXTOR
Simulation of the plasma-wall interaction in a tokamak with the Monte Carlo code ERO-TEXTOR
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DOI：
10.1088/0029-5515/40/5/311
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发表时间：
2000-05
期刊：
影响因子：
3.3
通讯作者：
A. Kirschner;V. Philipps;J. Winter;U. Kögler
中科院分区：
文献类型：
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作者：
A. Kirschner;V. Philipps;J. Winter;U. Kögler
等离子体与壁的相互作用一直是聚变能研究发展中的关键问题之一。一方面，等离子体诱导的侵蚀会严重限制壁件的寿命，另一方面，被侵蚀的粒子会被输送到核心等离子体中，导致聚变等离子体的稀释和辐射造成的能量损失。低z壁材料在等离子体核心的辐射损失很小，但物理溅射率很大。此外，碳基材料还会受到化学侵蚀。高z壁材的侵蚀较小，但辐射损失较大。目前等离子体壁研究的主要目标之一是为稳态等离子体场景找到一种特殊的壁材选择，这种壁材将在燃料稀释、辐射损失、壁寿命和壁内燃料库存方面提供最佳选择。为了更好地理解这一过程并估计未来核聚变装置中等离子体-壁相互作用的行为，在ERO代码的基础上开发了三维蒙特卡罗代码ERO- textor。它模拟了TEXTOR边界层表面附近的等离子体壁相互作用和输运过程。主要目的是模拟不同等离子体条件下不同壁材的侵蚀和再沉积行为，并将其与实验结果进行比较。这篇文章描述了ERO-TEXTOR代码的主要特性，并给出了一些模拟计算的例子来说明代码的应用。
The interaction of plasma with the walls has been one of the critical issues in the development of fusion energy research. On the one hand, plasma induced erosion can seriously limit the lifetime of the wall components, while, on the other hand, eroded particles can be transported into the core plasma where they lead to dilution of the fusion plasma and to energy losses due to radiation. Low-Z wall materials induce only small radiation losses in the plasma core but suffer from large physical sputtering rates. Carbon based materials in addition suffer from chemically induced erosion. High-Z wall materials show significantly smaller erosion but lead to large radiation losses. One of the main goals of present plasma-wall studies is to find a special choice of wall materials for steady state plasma scenarios that will provide an optimum with respect to fuel dilution, radiation losses, wall lifetime and fuel inventory in the walls. To obtain a better understanding of the processes and to estimate the plasma-wall interaction behaviour in future fusion devices the 3-D Monte Carlo code ERO-TEXTOR, based originally on the ERO code, has been developed. It models the plasma-wall interaction and transport processes in the vicinity of a surface positioned in the boundary layer of TEXTOR. The main aim is to simulate the erosion and redeposition behaviour of different wall materials under various plasma conditions and to compare this with experimental results. This contribution describes the main features of the ERO-TEXTOR code and gives some examples of simulation calculations to illustrate the application of the code.