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首页> 外文期刊>Plasma physics and controlled fusion >Modelling of tungsten and beryllium dust in ITER
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Modelling of tungsten and beryllium dust in ITER

机译：ITER中钨和铍尘的建模

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Production of dust particles during tokamak operation is a critical issue for magnetic confinement fusion. Their introduction into the reactor can have serious consequence on its performance and can constitute a safety issue. For these reasons the study of dust particles in tokamaks is crucial. Direct experimental observations of such particles that would give insight into their behaviour are quite challenging. In this context, numerical modelling of the relevant phenomena, plays a key role for better understanding the transport mechanisms of dust in tokamaks. In this work the dust transport code, Dust in tokamaks (DTOKS), is used to investigate how far tungsten and beryllium dust grains can penetrate into the ITER plasma. We simulate W and Be dust grains, with radii r _d=1-100m, and injection velocities, v _(inj)=1- 100ms ~1, ejected from three different locations of the ITER vessel. It was found that particles with radius larger than 10m, with v _(inj)=10ms ~1, can survive long enough to reach the separatrix. Furthermore, the important roles of the initial injection velocity and injection location have been highlighted.
机译：托卡马克操作期间产生尘埃颗粒是磁约束聚变的关键问题。将它们引入反应器可能对其性能产生严重影响，并可能构成安全问题。由于这些原因，研究托卡马克中的尘埃颗粒至关重要。对此类粒子进行直接实验观察以了解其行为非常具有挑战性。在这种情况下，相关现象的数值模拟对于更好地了解托卡马克中灰尘的传输机制起着关键作用。在这项工作中，使用了粉尘运输法规“托卡马克粉尘（DTOKS）”来研究钨和铍粉尘颗粒可以渗透到ITER等离子体中的程度。我们模拟了W和Be尘埃粒子，其半径r _d = 1-100m，注入速度v _（inj）= 1-100ms〜1，是从ITER容器的三个不同位置喷出的。已经发现，半径大于10m且v_（inj）= 10ms〜1的粒子可以生存足够长的时间以到达分离线。此外，突出了初始注射速度和注射位置的重要作用。

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