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arXiv 1707.05901physics.plasm-ph
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回旋运动Landau算子的微分形式

Differential formulation of the gyrokinetic Landau operator

Eero Hirvijoki, Alain J. Brizard, David Pfefferlé

摘要:

继最近严格推导出一个能量一致的回旋碰撞算子在所谓的朗道表示,本文探讨了找到一个微分公式的回旋朗道碰撞算子的可能性。据观察,虽然微分配方是可能的,在gyrokinetic相空间,减少所得到的系统的偏微分方程,通过gyroaveraging五个维度构成了挑战。基于目前的工作,它是可能的,Gyrocentre类似物的Rosenbluth-MacDonald-Judd势函数必须保持gyroangle依赖。

英文摘要:

Subsequent to the recent rigorous derivation of an energetically consistent gyrokinetic collision operator in the so-called Landau representation, this paper investigates the possibility of finding a differential formulation of the gyrokinetic Landau collision operator. It is observed that, while a differential formulation is possible in the gyrokinetic phase space, reduction of the resulting system of partial differential equations to five dimensions via gyroaveraging poses a challenge. Based on the present work, it is likely that the gyrocentre analogues of the Rosenbluth-MacDonald-Judd potential functions must be kept gyroangle dependent.

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