为了节约用于驱动电流的功率,也为了使反应堆具有更好的约束性能,近年来对大比例自举电流维持的托卡马克位形从实验和理论上进行了很多研究。这里我们应用一种很有效的展开方法[1]并假定托卡马克编阶适用,将Grad-Shafranov方程展开,获得一组常微分方程,可以选用不同的输入参数来确定平衡位形。用此法我们得到了全自举电流托卡马克 In order to save the power for driving current, and to make the reactor have better restraint performance, a lot of experiments and theoretical studies have been done on the tokamak shape that a large proportion of bootstrap current is maintained in recent years. Here we apply a very efficient method of expansion [1] and assume that tokamak is applied in order to expand the Grad-Shafranov equation to obtain a set of ordinary differential equations. Different input parameters can be used to determine the equilibrium shape. Using this method we got a full bootstrap current tokamak