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ewok

a simple 2D Particle-In-Cell code

This software was my first essay in python-fortran-mpi development.

In 2011 the code was succefully used to model amplification of the radiation scattered by an electron beam in the optical lattice -- so-called optical lattice Raman XFEL [1], which was simulated using the Lorentz boosted frame.

Sweet feature of EWOK is a GUI written with Tkinter package, which allows to setup and launch the simulation.

To use:

  • start ewokGUI
  • select the input file
  • choose the output folder (the path should exist)
  • run the code

To analyse the results:

  • go to the output folder
  • use the default plotter. The possible choices are:
    • dns (electron density)
    • idns (ion density)
    • fld (electromagnetic potential)
    • estat (electrostatic potential)
    • phs (analysis of particles phase distributions: choices are x,y,vx,vy,gamma)
    • RETURN key to exit
    • input time step and input limits fields may be left blank

EWOK is not to be used for any scientific research, and its Maxwell is very specific for the case considered in [1], and it does numerous simplifications of the PIC method (it alo may contain new or old bugs). Some documetation can be found in ./docs/

[1] I. A. Andriyash, E. d’Humières, V. T. Tikhonchuk, and Ph. Balcou Phys. Rev. Lett. 109, 244802