Predictions of gyrokinetic turbulent transport in proton-boron plasmas on EHL-2 spherical torus  

作　　者：Muzhi TAN Jianqiang XU Huarong DU Jiaqi DONG Huasheng XIE Xueyun WANG Xianli HUANG Yumin WANG Xiang GU Bing LIU Yuejiang SHI Yunfeng LIANG the EHL-2 Team 谭沐芝;许健强;杜华荣;董家齐;谢华生;王雪韵;黄贤礼;王嵎民;顾翔;刘兵;石跃江;梁云峰;the EHL-2 Team(Hebei Key Laboratory of Compact Fusion,Langfang 065001,People’s Republic of China;ENN Science and Technology Development Co.,Ltd.,Langfang 065001,People’s Republic of China;Southwestern Institute of Physics,Chengdu 610041,People’s Republic of China;Southwest Jiaotong University,Chengdu 610031,People’s Republic of China;Forschungszentrum Jülich GmbH,Institute of Fusion Energy and Nuclear Waste Management-Plasma Physics,Partner of the Trilateral Euregio Cluster(TEC),Jülich 52425,Germany)

机构地区：[1]Hebei Key Laboratory of Compact Fusion,Langfang 065001,People’s Republic of China [2]ENN Science and Technology Development Co.,Ltd.,Langfang 065001,People’s Republic of China [3]Southwestern Institute of Physics,Chengdu 610041,People’s Republic of China [4]Southwest Jiaotong University,Chengdu 610031,People’s Republic of China [5]Forschungszentrum Jülich GmbH,Institute of Fusion Energy and Nuclear Waste Management-Plasma Physics,Partner of the Trilateral Euregio Cluster(TEC),Jülich 52425,Germany

出　　处：《Plasma Science and Technology》2025年第2期87-96,共10页等离子体科学和技术(英文版)

基　　金：partly supported by SWIP project(No.SWIP-JYHT-12423).

摘　　要：The EHL-2 spherical torus at ENN is the next-generation experimental platform under conceptual design,aiming at realizing proton-boron(p-^(11)B)thermonuclear fusion,which is an attractive pathway towards neutron-free fusion.To achieve high-performance steady-state plasma,it is extremely necessary to study the turbulence transport characteristics with high boron content in the plasma core.This study investigates the transport properties in the core internal transport barrier(ITB)region of p-^(11)B plasma utilizing the gyrokinetic code GENE in view of the high ion temperature scenario of EHL-2,specifically focusing on the impact of boron fractions and plasmaβon the microinstabilities and corresponding transport features.Numerical findings indicate that the inclusion of boron species effectively suppresses the trapped electron modes(TEMs)as well as promoting a transition from electromagnetic to electrostatic turbulence with increased boron fraction,which is a result of the suppression of microinstabilities by effective charge and mass.Moreover,it has been identified that the external E×B rotational shear has a notable inhibitory influence on transport,which can reduce the transport level by two to three orders of magnitude,especially at medium boron content.The suppressive effect of E×B on turbulence is weakened once the kinetic ballooning mode(KBM)is excited and the transport shows a rapid increase withβtogether with a reduction in zonal flow amplitude,which is consistent with previous findings.Therefore,it is strongly suggested that exploring advanced strategies for mitigating turbulent transport at highβregimes is necessary for the active control of plasma behavior regarding p-^(11)B plasma-based fusion devices such as EHL-2.

关 键 词：turbulence GYROKINETIC boron fraction(Some figures may appear in colour only in the online journal) 

分 类 号：O35[理学—流体力学]