HT-7托卡马克等离子体电子热扩散系数与等离子体参数的关系  

Relationship Between Electron Thermal Diffusivity and Plasma Parameters on the HT-7 Tokamak

作　　者：张先梅[1] 万宝年[2] 

机构地区：[1]华东理工大学物理系,上海200237 [2]中科院等离子体物理研究所,合肥230031

出　　处：《华东理工大学学报（自然科学版）》2004年第5期584-587,共4页Journal of East China University of Science and Technology

摘　　要：研究了HT-7托卡马克装置欧姆放电情况下电子热扩散系数χe的空间分布以及它与等离子体参数如等离子体中心弦平均密度、等离子体电流的关系。χe沿等离子体小半径的分布是逐渐增大,中心最低。χe在等离体1/2小半径处的数值随等离子体的中心弦平均密度增大而降低,随等离子体电流的增大而增大。且硼化后的值比硅化后的值稍小一些。χe比INTOR定标小很多,但与欧姆放电情况下的Merezhkin定标以及Coppi-Mazzucato定标数值差不多。Electron heat diffusivity χ_e profile on the HT-7 Tokamak was estimated in the ohmically-heated plasma, and the relationship between χ_e and plasma parameters such as central line-averaged electron density and plasma current was studied in this article. χ_e increases along with the plasma minor radius. It increases with plasma current, but it decreases with increasing central line-averaged electron density. χ_e after boronization is slightly lower than that after siliconization. It is significantly lower than INTOR scaling, but it is somewhat close to the magnitude of Merezhkin scaling, and Coppi-Mazzucato scaling for the ohmically-heated plasma.

关 键 词：等离子体参数 电子 HT-7托卡马克装置 热扩散系数 半径 中心 硅化 托卡马克等离子体 放电 

分 类 号：TL631.24[核科学技术—核技术及应用] O532[理学—等离子体物理]