Guiding Center Equations of High Accuracy

R.B. White, G. Spizzo and M. Gobbin

关键词: Charged Particles;    Particle Dynamics;    Wave Interaction;    Particles;   

DOI  :  10.2172/1072362
RP-ID  :  PPPL-4862
PID  :  OSTI ID: 1072362

学科分类：原子、分子光学和等离子物理

美国|英语

来源: SciTech Connect

【 摘 要 】

Guiding center simulations are an important means of predicting the effect of resistive and ideal magnetohydrodynamic instabilities on particle distributions in toroidal magnetically confined thermonuclear fusion research devices. Because saturated instabilities typically have amplitudes of ?? B/B of a few times 10-4 numerical accuracy is of concern in discovering the effect of mode particle resonances. We develop a means of following guiding center orbits which is greatly superior to the methods currently in use. In the presence of ripple or time dependent magnetic perturbations both energy and canonical momentum are conserved to better than one part in 1014, and the relation between changes in canonical momentum and energy is also conserved to very high order.