Determination of Be sputtering yields from spectroscopic observations at the JET ITER-like wall based on three-dimensional ERO modelling
Determination of Be sputtering yields from spectroscopic observations at the JET ITER-like wall based on three-dimensional ERO modelling
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DOI：
10.1088/0031-8949/2014/t159/014057
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发表时间：
2014-04
期刊：
影响因子：
2.9
通讯作者：
D. Borodin;S. Brezinsek;J. Miettunen;M. Stamp;A. Kirschner;C. Björkas;M. Groth;S. Marsen;C. Silva;S. Lisgo;D. Matveev;M. Airila;V. Philipps
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作者：
D. Borodin;S. Brezinsek;J. Miettunen;M. Stamp;A. Kirschner;C. Björkas;M. Groth;S. Marsen;C. Silva;S. Lisgo;D. Matveev;M. Airila;V. Philipps
ITER第一壁(FW)寿命的估计，以前使用三维蒙特卡罗代码(Borodin等人，2011物理。SCR。T145 014008)，这在很大程度上取决于铍(Be)的物理溅射产额的假设。重要的是在现有装置上验证各自的模型和数据，包括作为大多数与热核实验堆有关的实验的喷射式热核实验堆(ILW)。在ERO中采用与以前在ITER预测中使用的相同的溅射输入数据，ERO对Be光强度的模拟(使用ADAS的最新原子数据和测量的等离子体条件)显示，即使使用假设D表面含量50%的低估计，假设产额也高估了2倍。这一结果表明，这一假设更倾向于等离子体润湿区。它指出，可能有必要修正(减少)各自对Be溅射产额的估计，并相应地重新考虑ITER FW寿命预测。
Estimations of the ITER first wall (FW) lifetime, previously made using the three-dimensional Monte-Carlo ERO code (Borodin et al 2011 Phys. Scr. T145 014008), depend strongly on the assumptions of the physical sputtering yield for beryllium (Be). It is of importance to validate the respective model and data at existing devices including the JET ITER-like wall (ILW) as most ITER-relevant experiments. Applying the same sputtering input data in ERO as those used before in the ITER-predictions, the ERO simulations for the Be light intensity (using up to date atomic data from ADAS and measured plasma conditions) reveal a factor of 2 overestimation in the assumed yield even if the low estimate assuming 50% D surface content is used. This result indicates the preference of this assumption for plasma-wetted areas. It points to a possible necessity to correct (reduce) the respective estimates for the Be sputtering yield and, accordingly, re-visit the ITER FW lifetime predictions.