HL-1M多发弹丸加料等离子体的特性  

PLASMA PERFORMANCE WITH MULTI SHOT PELLET FUELING IN THE HL 1M TOKAMAK

作　　者：肖正贵[1] 李波[1] 刘德权[1] 李立[1] 郑银甲[1] 郭干城[1] 邓中朝[1] 董贾福[1] 王恩耀[1] 

机构地区：[1]核工业西南物理研究院

出　　处：《核聚变与等离子体物理》1999年第3期159-164,共6页Nuclear Fusion and Plasma Physics

基　　金：国家自然科学基金

摘　　要：对ＨＬ－１Ｍ装置在一次放电中注入３－８粒氢弹丸的欧姆加热等离子体密度分布和扰动特征进行了研究。实验表明，器壁再循环对高密度的获得有重要的影响。在再循环较高的条件下连续注入３粒１．０ｍｍ弹丸，获得了加料实验的最好参数：等离子体中心密度ｎｅ（０）＝５．３×１０１３ｃｍ－３，总体储能Ｗｐ＝６．０ｋＪ，τｅ＝２６ｍｓ。用ＣＣＤ相机拍摄了弹丸消融云的照片，并对消融过程进行了简要的分析。结果证实，消融的不对称和弹丸轨迹的偏转是电子侧消融强于离子侧的结果，弹丸发射间隙及完整性对密度扰动有重要的影响。Three to eight hydrogen pellets have been injected into the HL 1M tokamak under ohmicallyheated plasma condition. The essential features of pellet fuelled plasma, including the electron density profile and its evolution and the perturbation in the plasma core, have been investigated. The relations of electron density profile with the pellet size, the launching interval and the recycling of the first wall,have been studied. The recycling of the first wall plays an important role in achieving high density discharge.Discharge parameters of n e (0)=5.3×10 13 cm -3 ,W p =6.0 kJ ,τ E =26 ms are obtained under high recycling condition with injection of three smaller pellets (1.0mm). The pellet ablation cloud image frames were obtained ith CCD camera.Brief analyses of the pellet ablation process show that asymmetry ablation and track bending of pellet clouds exist and are the results of stronger ablation in the electron side than in the ion side. The improtant effect of pellet size and integration on the density turbulence is observed also.

关 键 词：弹丸加料 密度分布 消融云 托卡马克 

分 类 号：TL631.24[核科学技术—核技术及应用]