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Modelling of the JET current ramp-up experiments and projection to ITER

机译：JET电流上升实验的建模并投影到ITER

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摘要

The current ramp-up phase of ITER demonstration discharges, performed at JET, is analysed and the capability of the empirical L-mode Bohm-gyroBohm and Coppi-Tang transport models as well as the theory-based GLF23 model to predict the temperature evolution in these discharges is examined. The analysed database includes ohmic (OH) plasmas with various current ramp rates and plasma densities and the L-mode plasmas with the ion cyclotron radio frequency (ICRF) and neutral beam injection (NBI) heating performed at various ICRF resonance positions and NBI heating powers. The emphasis of this analysis is a data consistency test, which is particularly important here because some parameters, useful for the transport model validation, are not measured in OH and ICRF heated plasmas (e.g. ion temperature, effective charge). The sensitivity of the predictive accuracy of the transport models to the unmeasured data is estimated. It is found that the Bohm-gyroBohm model satisfactorily predicts the temperature evolution in discharges with central heating (the rms deviation between the simulated and measured temperature is within 15%)
机译：分析了在JET进行的ITER示范放电的当前加速阶段，并分析了经验L型Bohm-gyroBohm和Coppi-Tang输运模型以及基于理论的GLF23模型的能力，可预测温度的变化。检查这些放电。分析的数据库包括具有各种电流斜率和等离子体密度的欧姆（OH）等离子体以及具有离子回旋加速器射频（ICRF）和中性束注入（NBI）加热的L型等离子体，在各种ICRF共振位置和NBI加热功率下进行加热。这种分析的重点是数据一致性测试，这在这里尤为重要，因为在OH和ICRF加热的等离子体中未测量某些对传输模型验证有用的参数（例如离子温度，有效电荷）。估计运输模型的预测准确性对未测数据的敏感性。发现Bohm-gyroBohm模型可以令人满意地预测具有集中供热的放电中的温度演变（模拟温度与测量温度之间的rms偏差在15％以内）

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