HL-1M托卡马克氦输运和排除  

HELIUM TRANSPORT AND REMOVAL IN THE HL-1M TOKAMAK

作　　者：彭利林[1] 邓柏权[1] 邓慧忱 严建成[1] 严东海[1] 唐年益[1] 

机构地区：[1]核工业西南物理研究院,成都610041

出　　处：《核聚变与等离子体物理》2001年第3期144-152,共9页Nuclear Fusion and Plasma Physics

基　　金：国家自然科学基金资助项目 (198895 0 2 )

摘　　要：研究了HL 1M托卡马克常规欧姆放电和改善约束状态下的氦输运和排除 ,并与一维蒙特卡罗中性氦输运程序IDHET的计算结果进行了比较。实验结果表明 ,真空泵能有效地抽除辉光放电清洗后在剩余气体中的氦 ,使真空室内的氦趋于一个较低的固有水平。在改善约束实验中 ,发现氦有积累增加的趋势 ,氦谱线发射强度径向分布峰向内移。在对总体约束影响很小的情况下 ,利用低水平的MHD扰动、采取LHCD与ECH辅助加热功率组合等进行了一些选择性排氦实验 ,并对将来堆条件下或HL 2A装置上利用射频场有质动力改善排氦效率的前景进行了讨论。Helium transport and removal have been studied in the HL 1M tokamak under normal ohmic discharge and improved confinement conditions respectively.They are compared with the results of calculation obtained using the one dimensional Monte Carlo neutral helium transport code IDHET.Experimental results show that the vacuum pump system can effectively pump out the helium in the residual gas after a He GDC,so that helium can be reduced to a lower intrinsic level.In the improved confinement experiments,the tendency for helium accumulation to increase has been found,and the peak of radial profile for helium line emission intensity moves inward.Some methods of selective helium removal have been tested,such as utilizing low level sawtooth activities or edge perturbations.Employing a combination of auxiliary heating power by LHCD with ECH produces no undue adverse effects on global confinement.Finally, the prospects of applying an RF ponderomotive force potential to improve helium removal efficiency have been discussed for a future reactor and the HL 2A tokamak.

关 键 词：氦输运 选择性排氦 蒙特卡罗模拟 HL-1M 托卡马克放电 D-T聚变反应堆 

分 类 号：TL612.1[核科学技术—核技术及应用]