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本文利用一维圆柱等离子体输运编码(TRANPY),编制了模拟锯齿振荡的大型编码(SAWMOD)。对锯齿振荡的研究,我们选用了两种具有代表性的理论模型:重联模型和湍流模型,后者特别适用于低qa放电的锯齿特性研究。重联模型的锯齿振荡是由于磁力线的完全重联引起的,而湍流模型的锯齿振荡是因为微观湍流或磁力线的随机化而产生的。最后,我们将HL─1装置的一次典型高密放电的参数代入(SAWMOD)编码,运算结果表明,重联模型和湍流模型均能解释实验观测的锯齿现象,理论模拟与实验结果符合较好。
In this paper, one-dimensional cylindrical plasma transport encoding (TRANPY) is used to simulate large-scale coding (SAWMOD) of sawtooth oscillation. For the study of sawtooth oscillation, we choose two representative theoretical models: the reconnection model and the turbulence model, which is especially suitable for the study of the sawtooth characteristics of low qa discharge. The jagged oscillation of the reconnection model is due to the complete reconnection of the magnetic lines of force, whereas the jagged oscillation of the turbulence model is due to the randomization of the microscopic turbulence or magnetic field lines. Finally, we put SAWMOD code into a typical high-density discharge of the HL-1 device. The results show that both the reconnection model and the turbulence model can explain the sawtooth phenomenon observed experimentally, and the theoretical simulation is in good agreement with the experimental results.