托卡马克中电子回旋波与低杂波协同电流驱动的负效应机制  

Mechanisms of the negative synergy effect between electron cyclotron current drive and lower hybrid current drive in tokamak

作　　者：陈少永[1] 洪斌斌[1] 杨文[1,2] 唐昌建[1] 张新军[3] 

机构地区：[1]四川大学物理科学与技术学院,成都610065 [2]中国科学院物理研究所,北京100190 [3]中国科学院等离子体物理研究所,合肥230031

出　　处：《核聚变与等离子体物理》2013年第3期214-218,共5页Nuclear Fusion and Plasma Physics

基　　金：ITER国内配套研究项目资助的课题(2009GB105003;2010GB107003;2013GB107002)

摘　　要：揭示了电子回旋波与低杂波协同驱动的净增协同电流与波注入功率之间所呈现的非线性关系。结果发现,当低杂波功率较低时,净增电流将随回旋波功率增大而减小甚至于变成负值,本文将此现象定义为双波驱动的负效应,并首次对其进行了相关的物理研究。研究表明,回旋波引起低杂波功率沉积剖面峰化和捕获电子效应是导致负效应的两个主要原因。目前的研究有助于深入理解双波驱动物理以及设计相关实验,并为相关的实验设计提供依据。The synergy current drive by combining electron cyclotron wave （ECW） with lower hybrid wave （LHW） can be used to either increase the noninductive current drive efficiency or shape the plasma current profile In this paper, the synergy current drive by ECW and LHW is studied with numerical simulation. The nonlinear relationship between the wave powers and the synergy current of ECW and LHW is revealed. When the LHW power is small, the synergy current reduces as the ECW power increases, and the synergy current is even reduced to lower than zero, which is referred as negative synergy in the this context. Research shows that the mechanism of the negative synergy is the peaking effect of LHW power profile and the trapped electrons effect. The present research is helpful for understanding the physics of synergy between electron cyclotron current drive and lower hybrid current drive, it can also instruct the design of experiments.

关 键 词：托卡马克 电子回旋波 低杂波 电流驱动 

分 类 号：O532.23[理学—等离子体物理]