Initialization

lcode.init(config)

Initialize all the arrays needed for step and config.beam.

This function performs quite a boring sequence of actions, outlined here for interlinking purposes:

• validates the oddity of config.grid_steps [Fields and densities grid],
• validates that config.reflect_padding_steps is large enough [Reflect and ‘plasma’ boundaries],
• calculates the reflect_boundary and monkey-patches it back into config,
• initializes the x and y arrays for use in config_example.beam(),
• calculates the plasma placement boundary,
• immediately passes it to make_plasma(), leaving it oblivious to the padding concerns,
• performs the initial electrion deposition to obtain the background ions charge density [Background ions],
• groups the constant arrays into a GPUArray instance const, and
• groups the evolving arrays into a GPUArray instance state.