Comparative modeling of JT-60U and JET discharges

JT-60UとJET放電の比較モデリング

林 伸彦; Garcia, J.*; 成田 絵美

Hayashi, Nobuhiko; Garcia, J.*; Narita, Emi

Validation and verification of models for plasma simulation are being carried out through a JA-EU cooperation, especially to make reliable recipe for JT-60SA prediction. The same recipe is, of course, applicable to ITER prediction. In this activity, JT-60U and JET data are used for validation (H-mode and advanced inductive plasmas, at present), and integrated modeling codes TOPICS and CRONOS are used for verification. The following results are obtained at present. As for three heat transport models (CDBM, Bohm/gyro-Bohm, GLF23), in H-mode plasma, CDBM and BgB models can be used for rough estimation, while GLF23 for more precise estimation. On the other hand, in advanced inductive plasma, CDBM is more reliable than GLF23. For this plasma, it is necessary to try TGLF, which is improved version of GLF23. As for particle transport model, GLF23 could reproduce experiments in CRONOS. As for pedestal model, Cordey's scaling model could reproduce experiments in CRONOS. This pedestal model, however, requires pedestal width model for prediction. For this, EPED scaling or peeling-ballooning mode analysis will be applied. TOPICS will verify the above particle and pedestal modelings.