论文标题
iTer中alfvén本特征模的全局线性和非线性陀螺仪建模
Global linear and nonlinear gyrokinetic modelling of Alfvén eigenmodes in ITER
论文作者
论文摘要
Alfvénic不稳定性的线性和非线性建模，最著名的是使用全局非线性电磁旋转模型ORB5获得的Alfvénic型（TAES），用于iTer tokamak的15个MA场景。线性模拟表明，椭圆形的alfvéneigenmodes和奇数taes仅受到弱抑制，但并没有被α颗粒激发，而阿尔法颗粒的驱动偏爱偶数均匀的taes。低模式数字TAE是全球的，需要全球治疗。非线性，即使具有名义EP密度的两倍，单模式模拟也会导致EP传输可忽略不计，但是多模式模拟预测，随着名义EP密度的两倍，增强的饱和度和显着的EP重新分布也将发生两倍。
Linear and nonlinear modelling of Alfvénic instabilities, most notably toroidal Alfvén eigenmodes (TAEs), obtained by using the global nonlinear electromagnetic gyrokinetic model of the code ORB5 are presented for the 15 MA scenario of the ITER tokamak. Linear simulations show that elliptic Alfvén eigenmodes and odd-parity TAEs are only weakly damped but not excited by alpha particles, whose drive favours even-parity TAEs. Low mode number TAEs are found to be global, requiring global treatment. Nonlinearly, even with double the nominal EP density, single mode simulations lead to saturation with negligible EP transport however multi-mode simulations predict that with double the nominal EP density, enhanced saturation and significant EP redistribution will occur.
