Tokamak plasma with negative central current density is known to be unstable for m = 1 = 0 resistive kink magnetohydrodynamic instability and the explanation for the absence of negative central current, the so-called current hole phenomena. is made by the destabilization of the mode. However, a strong reversed magnetic shear configuration has two resonant surfaces, for low mode numbers and should be unstable for the double tearing mode (DTM). Here, we examine the effects of DTM on the formation of current hole and show that the occurrence of DTM does not change the situation completely. The growth of DTM. flattens the current profile near the minimum-q region. here q is the safety factor. and the current gradient to drive n = 0 mode usually remains after a reconnection event due to DTM and the stability of m = 1 = 0 mode is not affected much by the DTM activity.
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机译：已知具有负中心电流密度的托卡马克等离子体对于m = 1 / n = 0电阻扭结磁流体动力学不稳定性是不稳定的，并解释了没有负中心电流的现象，即所谓的电流空穴现象。是由模式的不稳定造成的。但是，对于低模数，强反向磁剪切构型具有两个谐振表面，并且对于双撕裂模（DTM）应该不稳定。在这里，我们检查了DTM对电流孔形成的影响，并表明DTM的出现并不能完全改变这种情况。 DTM的发展。在最小q区域附近使当前轮廓变平。 q是安全系数。并且由于DTM，在重新连接事件之后，驱动n = 0模式的电流梯度通常仍然存在，并且m = 1 / n = 0模式的稳定性不受DTM活动的影响很大。
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