Optimized Loading for Particle-in-cell Gyrokinetic Simulations

Lewandowski, J.L.V.

Princeton University. Plasma Physics Laboratory.

关键词: Wavelengths Guiding-Center Approximations;    Guiding-Center Approximations;    Electrostatics;    70 Plasma Physics And Fusion Technology;    Geometry;   

DOI  :  10.2172/827943
RP-ID  :  PPPL-3956
RP-ID  :  AC02-76CH03073
RP-ID  :  827943

美国|英语

来源: UNT Digital Library

【 摘 要 】

The problem of particle loading in particle-in-cell gyrokinetic simulations is addressed using a quadratic optimization algorithm. Optimized loading in configuration space dramatically reduces the short wavelength modes in the electrostatic potential that are partly responsible for the non-conservation of total energy; further, the long wavelength modes are resolved with good accuracy. As a result, the conservation of energy for the optimized loading is much better that the conservation of energy for the random loading. The method is valid for any geometry and can be coupled to optimization algorithms in velocity space.