1085 / 2019-10-29 10:13:22

CFETR新经典撕裂模扰动引起的alphas损失

全体主题 > 磁约束核聚变理论与模拟

we present a guiding center simulation of alpha particle behavior under the large-scale magnetic perturbation NTM with test particle modeling code ORBIT. The magnetic islands caused by 2/1 and 3/2 NTM are introduced by a field perturbation calculated by TM8 code and superimposed on the equilibrium filed. The plasma data of CFETR hybrid scenario have been used in the TRANSP/NUBEAM calculation to provide the realistic energetic particle distribution, 20 000 particles are traced up to 0.1 * alphas slowing down time, or until they escape LCFS. During the particle guiding center following, different perturbation amplitude was included from island width in 0.08-0.15 w/a. apart form particle tracing estimation, the Poincare plot and the kinetic Poincare plot are help to understand the alphas confinement with perturbation amplitude scanning. The work indicated the stochastic threshold for is about 0.09w/a, the big stochastic area will appear above it, the CFETR should develop ECW to control NTM.