Basic characteristics of the plasma in a Tokamak with four internal conductor rings have been studied, including the influence of discharge conditions on the plasma parameters and sawteeth.

• 本文叙述了带内环的托卡马克中等离子体的基本特性，给出了各放电参数对等离子体的影响以及等离子体的某些特殊的锯齿现象。