On the stability of small-scale ballooning modes in axisymmetric mirror traps  

作　　者：Igor KOTELNIKOV Andrej LIZUNOV Qiusun ZENG 

机构地区：[1]Budker Institute of Nuclear Physics SB RAS,Novosibirsk 630090,Russia [2]Novosibirsk State University,Novosibirsk 630090,Russia [3]Institute of Nuclear Energy Safety Technology HFIPS CAS,Hefei 230031,People's Republic of China

出　　处：《Plasma Science and Technology》2022年第1期8-17,共10页等离子体科学和技术（英文版）

基　　金：financially supported by the Ministry of Education and Science of the Russian Federation;supported by Chinese Academy of Sciences Presidents International Fellowship Initiative(PIFI)under Grant No.2022VMA0007;Chinese Academy of Sciences International Partnership Program under Grant No.116134KYSB20200001。

摘　　要：It is shown that a steepening of the radial plasma pressure profile leads to a decrease in the critical value of beta,above which,small-scale balloon-type perturbations in a mirror trap become unstable.This may mean that small-scale ballooning instability leads to a smoothing of the radial plasma profile.The critical beta values for the real magnetic field of the gas-dynamic trap and various plasma pressure radial profiles was also calculated.For a plasma with a parabolic profile critical beta is evaluated at the level of 0.72.A previous theoretical prediction for this trap was almost two times lower than maximal beta 0.6 achieved experimentally.

关 键 词：mirror trap ballooning modes critical beta 

分 类 号：TL612[核科学技术—核技术及应用]