دورية أكاديمية
Energetic passing particle-driven instabilities and their impact on discharge evolution in KSTAR
| العنوان: | Energetic passing particle-driven instabilities and their impact on discharge evolution in KSTAR |
|---|---|
| المؤلفون: | Jhang H., Kim J., Kang J., Kim M., Zhang L. L., Fu G. Y., Zonca F., Chen L., Chavdarovski I., Choi M. J., Falessi M. V., Lee S., Qiu Z. Y. |
| المساهمون: | Jhang, H., Kim, J., Kang, J., Kim, M., Zhang, L. L., Fu, G. Y., Zonca, F., Chen, L., Chavdarovski, I., Choi, M. J., Falessi, M. V., Lee, S., Qiu, Z. Y. |
| سنة النشر: | 2023 |
| المجموعة: | ENEA Open Archive (Agenzia nazionale per le nuove tecnologie, l'energia e lo sviluppo economico sostenibile) |
| مصطلحات موضوعية: | energetic particle modes, energetic particles, fishbone instability, instability, stability analysis, tokamak plasma |
| الوصف: | An experimental study is conducted on the onset and evolution characteristics of energetic particle-driven instabilities in Korea Superconducting Tokamak Advanced Research (KSTAR) with dominant tangential neutral beam injection (NBI). A scan of NBI beam energy shows the evanescence of the sawtooth crash and the concomitant onset of the strong passing particle-driven low-frequency fishbone instability. A quantitative analysis shows that the safety factor (q)-profile in the core region is clamped by a balance between the depletion of energetic passing particles by the fishbone instability and their external replenishment. Two synchronized chirping modes with distinct toroidal mode numbers (n = 1 and n = 5) supersede the fishbone instability after a self-organized q-profile is attained. An analysis shows that the n = 1 mode is likely to be a high-frequency beta-induced Alfvén eigenmode fishbone branch, while the n = 5 mode is an energetic particle mode (EPM). A dynamic system analysis of the synchronized EPM (S-EPM) shows that a stable S-EPM cycle can exist when the coupling between the two modes involved is insignificant. The potential impact of such EPMs on the establishment of a burning plasma scenario with a flat core q-profile is briefly discussed. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| العلاقة: | volume:65; issue:9; journal:PLASMA PHYSICS AND CONTROLLED FUSION; https://hdl.handle.net/20.500.12079/74168Test; info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85167794738 |
| DOI: | 10.1088/1361-6587/ace3f2 |
| الإتاحة: | https://doi.org/20.500.12079/74168Test https://doi.org/10.1088/1361-6587/ace3f2Test https://hdl.handle.net/20.500.12079/74168Test |
| رقم الانضمام: | edsbas.3191C58C |
| قاعدة البيانات: | BASE |
| DOI: | 10.1088/1361-6587/ace3f2 |
|---|