期刊
PLASMA PHYSICS AND CONTROLLED FUSION
卷 59, 期 9, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1361-6587/aa7977
关键词
neutral beam injection; energetic particle transport; reduced transport models; NSTX spherical torus; Alfvenic instabilities
资金
- NSTX Team
- US Department of Energy, Office of Science, Office of Fusion Energy Sciences [DE-AC0209CH11466]
Alfvenic instabilities (AEs) are well known as a potential cause of enhanced fast ion transport in fusion devices. Given a specific plasma scenario, quantitative predictions of (i) expected unstable AE spectrum and (ii) resulting fast ion transport are required to prevent or mitigate the AEinduced degradation in fusion performance. Reduced models are becoming an attractive tool to analyze existing scenarios as well as for scenario prediction in time-dependent simulations. In this work, a neutral beam heated NSTX discharge is used as reference to illustrate the potential of a reduced fast ion transport model, known as kick model, that has been recently implemented for interpretive and predictive analysis within the framework of the time-dependent tokamak transport code TRANSP. Predictive capabilities for AE stability and saturation amplitude are first assessed, based on given thermal plasma profiles only. Predictions are then compared to experimental results, and the interpretive capabilities of the model further discussed. Overall, the reduced model captures the main properties of the instabilities and associated effects on the fast ion population. Additional information from the actual experiment enables further tuning of the model's parameters to achieve a close match with measurements.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据