
April 25, 2014 11:1 PSP Book - 9in x 6in 06-Rashid-A.-Ganeev-c06
186 Characterization of Plasma Harmonics
(Crank–Nicholson), or the split operator techniques; in the context
of harmonic generation, this method has been firstly used in [34].
The development of numerical methods for the 3D case has been
initiated in [35, 36], where the 2D finite element (“grid”) method
was used. Later, it has been shown that the basis expansion methods,
which employ the symmetry of the problem, work much better [37–
40]. The modern codes are usually based on angular momentum
basis expansion with a subsequent solving of the coupled set
of equations for the radial wave functions ...