QN3D: A three-dimensional quasi-neutral hybrid particle-in-cell code with applications to the tilt mode instability in field reversed configurations
QN3D: A three-dimensional quasi-neutral hybrid particle-in-cell code with applications to the tilt mode instability in field reversed configurations
复制标题
QN3D：三维准中性混合颗粒细胞代码，应用于场反转配置中的倾斜模式不稳定性
DOI：
10.1016/0021-9991(89)90234-9
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发表时间：
1989
影响因子：
4.1
通讯作者：
E. Horowitz
中科院分区：
文献类型：
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作者：
E. Horowitz
讨论了场反转配置 (FRC) 的倾斜模式不稳定性。以前的数值模型没有充分解释这种模式的行为。介绍了笛卡尔坐标系中的颗粒细胞 (PIC) 模型，并解释了为什么它更接近地代表 FRC 的物理原理。 PIC 模型以 FORTRAN 代码 QN3D 实现。介绍了该代码的主要元素，包括优化所需的许多技术。我们讨论了依赖于 Cray-2 多处理器功能的优化中的许多主要因素。代码测试分三个阶段进行。首先，分析单粒子运动。接下来计算并模拟简正模态。最后，将QN3D应用于刚性转子问题。这些测试表明该代码适合在感兴趣的参数范围内模拟等离子体现象。最后，处理倾斜模式问题的两种情况。结果与当前的实验相符，并证实了我们关于其他模型为何不足的最初假设。
The tilt mode instability of a field reversed configuration (FRC) is discussed. Previous numerical models have not adequately explained the behavior of this mode. A particle-in-cell (PIC) model in Cartesian coordinates is introduced with an explanation as to why it represents the physics of FRC's more closely. The PIC model is implemented in a FORTRAN code, QN3D. The major elements of this code are presented including the many techniques required for its optimization. We discuss many of the major factors in optimization that are dependent upon features of the Cray-2 multiprocessor. Testing of the code is presented in three phases. First, single particle motion is analyzed. Next the normal modes are calculated and simulated. Finally, QN3D is applied to the rigid rotor problem. These tests indicate that the code is suited to model plasma phenomena in the parameter regimes of interest. Lastly, two cases of the tilt mode problem are treated. The results match current experiments and confirm our initial hypothesis as to why other models are not adequate.