A model of the asymmetric internal reconnection occurring in toroidal geometry when pressure effects are taken into account is proposed. This model predicts a toroidal modulation of the current sheet, which is strong and mainly pressure driven for a rather low shear value on the q=1 surface. This modulation gives magnetic field line stochasticity in the vicinity of the m=1 separatrix, increasing during the reconnection process and reaching a value that can explain a complete expulsion of the electronic energy before the completion of the reconnection if the central value of the safety factor is somewhat below 0.8. This model is compared with a full toroidal MHD simulation including toroidal harmonics up to n=11
提出了一个考虑压力效应的环形几何中非对称内部重联模型。该模型预测了电流片的环形调制，这种调制主要由压力驱动，且在q=1面上剪切值相当低时表现显著。该调制导致m=1分界层附近出现磁力线随机性，并在重联过程中不断增强，最终达到足以在安全因子中心值略低于0.8时完全耗散电子能量的水平。将该模型与包含高达n=11环形谐波的全环形MHD模拟进行了比较。