Energetic Particle Transport Prediction for CFETR Steady State Scenario Based on Critical Gradient Model
Yunpeng Zou1, V. S. Chan2,3, Wei Chen1*, Yongqin Wang1, Yumei Hou1, and Yiren Zhu1
1Southwestern Institute of Physics, Chengdu 610041, China 2General Atomics, San Diego, CA 92186, USA 3School of Nuclear Science and Technology, University of Science and Technology of China, Hefei 230026, China
Abstract：The critical gradient mode (CGM) is employed to predict the energetic particle (EP) transport induced by the Alfvén eigenmode (AE). To improve the model, the normalized critical density gradient is set as an inverse proportional function of energetic particle density; consequently, the threshold evolves during EP transport. Moreover, in order to consider the EP orbit loss mechanism in CGM, ORBIT code is employed to calculate the EP loss cone in phase space. With these improvements, the AE enhances EPs radial transport, pushing the particles into the loss cone. The combination of the two mechanisms raises the lost fraction to 6.6%, which is higher than the linear superposition of the two mechanisms. However, the loss is still far lower than that observed in current experiments. Avoiding significant overlap between the AE unstable region and the loss cone is a key factor in minimizing EP loss.
. [J]. 中国物理快报, 2021, 38(4): 45203-.
Yunpeng Zou, V. S. Chan, Wei Chen, Yongqin Wang, Yumei Hou, and Yiren Zhu. Energetic Particle Transport Prediction for CFETR Steady State Scenario Based on Critical Gradient Model. Chin. Phys. Lett., 2021, 38(4): 45203-.
2021, Vol. 38 
