1 files changed, 62 insertions, 0 deletions
diff --git a/Examples/Modules/gaussian_beam/PICMI_inputs_gaussian_beam.py b/Examples/Modules/gaussian_beam/PICMI_inputs_gaussian_beam.py
new file mode 100644
index 000000000..ecc8f5a65
--- /dev/null
+++ b/Examples/Modules/gaussian_beam/PICMI_inputs_gaussian_beam.py
@@ -0,0 +1,62 @@
+import numpy as np
+from pywarpx import picmi
+#from warp import picmi
+
+constants = picmi.constants
+
+nx = 32
+ny = 32
+nz = 32
+
+xmin = -2.
+xmax = +2.
+ymin = -2.
+ymax = +2.
+zmin = -2.
+zmax = +2.
+
+number_sim_particles = 32768
+total_charge = 8.010883097437485e-07
+
+beam_rms_size = 0.25
+electron_beam_divergence = -0.04*constants.c
+
+em_order = 3
+
+grid = picmi.Cartesian3DGrid(number_of_cells = [nx, ny, nz],
+                             lower_bound = [xmin, ymin, zmin],
+                             upper_bound = [xmax, ymax, zmax],
+                             lower_boundary_conditions = ['periodic', 'periodic', 'open'],
+                             upper_boundary_conditions = ['periodic', 'periodic', 'open'],
+                             warpx_max_grid_size=16)
+
+solver = picmi.ElectromagneticSolver(grid = grid,
+                                     cfl = 1.,
+                                     stencil_order=[em_order,em_order,em_order])
+
+electron_beam = picmi.GaussianBunchDistribution(n_physical_particles = total_charge/constants.q_e,
+                                                rms_bunch_size = [beam_rms_size, beam_rms_size, beam_rms_size],
+                                                velocity_divergence = [electron_beam_divergence, electron_beam_divergence, electron_beam_divergence])
+
+proton_beam = picmi.GaussianBunchDistribution(n_physical_particles = total_charge/constants.q_e,
+                                              rms_bunch_size = [beam_rms_size, beam_rms_size, beam_rms_size])
+
+electrons = picmi.Species(particle_type='electron', name='electrons', initial_distribution=electron_beam)
+protons = picmi.Species(particle_type='proton', name='protons', initial_distribution=proton_beam)
+
+sim = picmi.Simulation(solver = solver,
+                       max_steps = 10,
+                       verbose = 1,
+                       warpx_plot_int = 10,
+                       warpx_current_deposition_algo = 'direct')
+
+sim.add_species(electrons, layout=picmi.PseudoRandomLayout(n_macroparticles=number_sim_particles))
+sim.add_species(protons, layout=picmi.PseudoRandomLayout(n_macroparticles=number_sim_particles))
+
+# write_inputs will create an inputs file that can be used to run
+# with the compiled version.
+sim.write_input_file(file_name = 'inputs_from_PICMI')
+
+# Alternatively, sim.step will run WarpX, controlling it from Python
+#sim.step()
+