Transport modelling of JT-60U and JET plasmas with internal transport barriers towards prediction of JT-60SA high-beta steady-state scenario
Transport modelling of JT-60U and JET plasmas with internal transport barriers towards prediction of JT-60SA high-beta steady-state scenario
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DOI：
10.1088/1741-4326/aa88de
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发表时间：
2017-10
期刊：
影响因子：
3.3
通讯作者：
N. Hayashi;J. Garcia;M. Honda;E. Narita;S. Ide;G. Giruzzi;Y. Sakamoto
中科院分区：
文献类型：
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作者：
N. Hayashi;J. Garcia;M. Honda;E. Narita;S. Ide;G. Giruzzi;Y. Sakamoto
使用集成建模代码 TOPICS 和 CRONOS 对 JT-60U 和 JET 托卡马克中具有内部传输势垒的等离子体进行了传输建模，以预测 JT-60SA 中的高β稳态场景，这与这两种托卡马克具有相同的重要特征。异常热传输的典型模型是预测的主要不确定因素之一，已在JT-60U和JET上进行了实验数据验证，并使用模型配备的TOPICS和CRONOS进行了模型验证。研究发现，CDBM 模型预测的温度接近或低估了实验温度，因此可用于考虑等离子体性能下限的保守预测。通过使用 CDBM 模型，在机器能力范围内保守地预测了 JT-60SA 高β稳态等离子体。保守预测表明JT-60SA有足够的能力探索高β稳态等离子体及其可控性。讨论了与 E × B 剪切效应相关的模型修改，以提高预测能力。
Transport modelling of plasmas with internal transport barriers in JT-60U and JET tokamaks has been carried out using integrated modelling codes TOPICS and CRONOS for the prediction of high-beta steady-state scenario in JT-60SA, which shares important characteristics with both tokamaks. Typical models of anomalous heat transport, which is one of major uncertainties in the prediction, have been validated for the experimental data in JT-60U and JET, and TOPICS and CRONOS equipped with the models are used for the model verification. It is found that CDBM model predicts temperatures close to experiments or underestimates them, and thus can be used for the conservative prediction, which considers a lower bound of plasma performance. By using the CDBM model, a JT-60SA high-beta steady-state plasma has been conservatively predicted within the machine capability. The conservative prediction shows that the JT-60SA has enough capability to explore high-beta steady-state plasmas and their controllability. Model modifications related with an E × B shear effect to improve the prediction capability are discussed.