Tearing modes are a major concern for large tokamak devices. Therefore their detection and characterization is of importance for timely countermeasures to avoid significant impact on the discharge or at least prevent possible machine damage. In case of phase-locked tearing modes, the poloidal variation of induced magnetic field fluctuation depends on the amplitudes of and the phase difference between the individual modes. This affects mode detection and identification when not considered appropriately. The phase between phase-locked (2, 1) and (3, 1) tearing modes in ASDEX Upgrade has been determined from local electron temperature and magnetic measurements independently. It is shown that the modes can be in phase at any poloidal position starting from the low field side plasma midplane over the plasma top to the high field side midplane. This observation invalidates the widespread assumption that phase-locked tearing modes are in phase near the low field side midplane. Dependence of the in-phase position on both, the plasma pressure and the plasma rotation velocity, is observed.

撕裂模式是大型托卡马克设备的主要关注点。因此，它们的检测和表征对于及时采取对策至关重要，以避免对排放造成重大影响或至少防止可能的机器损坏。在锁相撕裂模式的情况下，感应磁场波动的倍数变化取决于各个模式之间的振幅和相位差。如果不适当考虑，这会影响模式检测和识别。ASDEX Upgrade中的锁相（2，1）和（3，1）撕裂模式之间的相位是根据本地电子温度和磁测量值独立确定的。结果表明，模式可以在从等离子体顶部上方的低场侧等离子体中平面到高场侧中平面的任何极点位置同相。这种观察使普遍的假设无效，即锁相撕裂模式在低场侧中平面附近处于同相状态。观察到同相位置对等离子体压力和等离子体旋转速度的依赖性。