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arXiv 1611.03210physics.plasm-ph
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螺旋等离子体中自举电流模拟的基准

Benchmark of the bootstrap current simulation in helical plasmas

Botsz Huang, Shinsuke Satake, Ryutaro Kanno, Hideo Sugama, Takuya Goto

摘要:

并行动量守恒对非轴对称系统中自举电流评估的重要性通过局部漂移动力学方程求解器中的基准来证明,即,零轨道宽度(ZOW)、DKES和PENTA代码。ZOW模型进行了扩展,包括离子平行平均流的电子-离子平行摩擦的影响。与DKES模型中只包含俯仰角散射项的碰撞算子相比,PENTA模型采用了Sugama-Nishimura方法来修正动量平衡。ZOW模型和PENTA模型对自举电流的计算结果吻合较好。没有平行动量守恒的DKES结果与ZOW和PENTA模型的结果有很大的偏差。本文的工作验证了ZOW和PENTA模型计算螺旋等离子体自举电流的可靠性。

英文摘要:

The importance of the parallel momentum conservation on the bootstrap current evaluation in nonaxisymmetric systems is demonstrated by the benchmarks among the local drift-kinetic equation solvers, i.e., the Zero-Orbit-width(ZOW), DKES, and PENTA codes. The ZOW model is extended to include the ion parallel mean flow effect on the electron-ion parallel friction. Compared to the DKES model in which only the pitch-angle-scattering term is included in the collision operator, the PENTA model employs the Sugama-Nishimura method to correct the momentum balance. The ZOW and PENTA models agree each other well on the calculations of the bootstrap current. The DKES results without the parallel momentum conservation deviates significantly from those from the ZOW and PENTA models. This work verifies the reliability of the bootstrap current calculation with the ZOW and PENTA models for the helical plasmas.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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