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picmi_inputfile_ionization-v2.py
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picmi_inputfile_ionization-v2.py
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"""
This file is part of PIConGPU.
Copyright 2024 PIConGPU contributors
Authors: Masoud Afshari, Brian Edward Marre
License: GPLv3+
"""
from picongpu import picmi
from picongpu import pypicongpu
import numpy as np
"""
@file PICMI user script reproducing the PIConGPU LWFA example
This Python script is example PICMI user script reproducing the LaserWakefield example setup, based on 8.cfg.
"""
# generation modifiers
ENABLE_IONS = True
ENABLE_IONIZATION = True
ADD_CUSTOM_INPUT = True
OUTPUT_DIRECTORY_PATH = "lwfa_ionization_v2"
numberCells = np.array([192, 2048, 192])
cellSize = np.array([0.1772e-6, 0.4430e-7, 0.1772e-6]) # unit: meter
# Define the simulation grid based on grid.param
grid = picmi.Cartesian3DGrid(
picongpu_n_gpus=[2, 4, 1],
number_of_cells=numberCells.tolist(),
lower_bound=[0, 0, 0],
upper_bound=(numberCells * cellSize).tolist(),
lower_boundary_conditions=["open", "open", "open"],
upper_boundary_conditions=["open", "open", "open"]
)
gaussianProfile = picmi.distribution.GaussianDistribution(
density=1.0e25,
center_front=8.0e-5,
sigma_front=8.0e-5,
center_rear=10.0e-5,
sigma_rear=8.0e-5,
factor=-1.0,
power=4.0,
vacuum_cells_front=50
)
solver = picmi.ElectromagneticSolver(
grid=grid,
method="Yee"
)
laser = picmi.GaussianLaser(
wavelength=0.8e-6,
waist=5.0e-6 / 1.17741,
duration=5.0e-15,
propagation_direction=[0.0, 1.0, 0.0],
polarization_direction=[1.0, 0.0, 0.0],
focal_position=[float(numberCells[0] * cellSize[0] / 2.0), 4.62e-5, float(numberCells[2] * cellSize[2] / 2.0)],
centroid_position=[float(numberCells[0] * cellSize[0] / 2.0), 0.0, float(numberCells[2] * cellSize[2] / 2.0)],
picongpu_polarization_type=pypicongpu.laser.GaussianLaser.PolarizationType.CIRCULAR,
a0=8.0,
picongpu_phase=0.0
)
random_layout = picmi.PseudoRandomLayout(n_macroparticles_per_cell=2)
# Initialize particles based on speciesInitialization.param
# simulation schema : https://github.com/BrianMarre/picongpu/blob/2ddcdab4c1aca70e1fc0ba02dbda8bd5e29d98eb/share/picongpu/pypicongpu/schema/simulation.Simulation.json
# for particle type see https://github.com/openPMD/openPMD-standard/blob/upcoming-2.0.0/EXT_SpeciesType.md
species_list = []
if not ENABLE_IONIZATION:
interaction = None
primary_electrons = picmi.Species(particle_type="electron", name="electron", initial_distribution=gaussianProfile)
species_list.append((primary_electrons , random_layout))
if ENABLE_IONS:
hydrogen_fully_ionized = picmi.Species(
particle_type="H", name="hydrogen", picongpu_fixed_charge=True, initial_distribution=gaussianProfile
)
species_list.append((hydrogen_fully_ionized, random_layout))
else:
if not ENABLE_IONS:
raise ValueError("Ions species required for ionization")
hydrogen_with_ionization = picmi.Species(
particle_type="H", name="hydrogen", charge_state=0, initial_distribution=gaussianProfile
)
species_list.append((hydrogen_with_ionization, random_layout))
secondary_electrons_from_ionization = picmi.Species(particle_type="electron", name="electron", initial_distribution=None)
species_list.append((secondary_electrons_from_ionization, None))
adk_ionization_model = picmi.ADK(
ADK_variant=picmi.ADKVariant.CircularPolarization,
ion_species=hydrogen_with_ionization,
ionization_electron_species=secondary_electrons_from_ionization,
ionization_current=None
)
bsi_effectiveZ_ionization_model = picmi.BSI(
BSI_extensions=[picmi.BSIExtension.EffectiveZ],
ion_species=hydrogen_with_ionization,
ionization_electron_species=secondary_electrons_from_ionization,
ionization_current=None
)
interaction = picmi.Interaction(
ground_state_ionization_model_list=[adk_ionization_model, bsi_effectiveZ_ionization_model]
)
sim = picmi.Simulation(
solver=solver,
max_steps=4000,
time_step_size=1.39e-16,
picongpu_moving_window_move_point=0.9,
picongpu_interaction=interaction,
picongpu_template_dir="/home/afshar87/afshari/simulation/picInputs/testPICMI/customTemplates"
)
for species, layout in species_list:
sim.add_species(species, layout=layout)
sim.add_laser(laser, None)
# additional non standardized custom user input
# only active if custom templates are used
# for generating setup with custom input see standard implementation,
# see https://picongpu.readthedocs.io/en/latest/usage/picmi/custom_template.html
if ADD_CUSTOM_INPUT:
min_weight_input = pypicongpu.customuserinput.CustomUserInput()
min_weight_input.addToCustomInput({"minimum_weight": 10.0}, "minimum_weight")
sim.picongpu_add_custom_user_input(min_weight_input)
output_configuration = pypicongpu.customuserinput.CustomUserInput()
output_configuration.addToCustomInput(
{
"png_plugin_SCALE_IMAGE": 1.0,
"png_plugin_SCALE_TO_CELLSIZE": True,
"png_plugin_WHITE_BOX_PER_GPU": False,
"png_plugin_EM_FIELD_SCALE_CHANNEL1": 7,
"png_plugin_EM_FIELD_SCALE_CHANNEL2": -1,
"png_plugin_EM_FIELD_SCALE_CHANNEL3": -1,
"png_plugin_CUSTOM_NORMALIZATION_SI": "5.0e12 / constants.c, 5.0e12, 15.0",
"png_plugin_PRE_PARTICLE_DENS_OPACITY": 0.25,
"png_plugin_PRE_CHANNEL1_OPACITY": 1.0,
"png_plugin_PRE_CHANNEL2_OPACITY": 1.0,
"png_plugin_PRE_CHANNEL3_OPACITY": 1.0,
"png_plugin_preParticleDensCol": "colorScales::grayInv",
"png_plugin_preChannel1_colorScale": "colorScales::green",
"png_plugin_preChannel2_colorScale": "colorScales::none",
"png_plugin_preChannel3_colorScale": "colorScales::none",
"png_plugin_preChannel1": "field_E.x() * field_E.x();",
"png_plugin_preChannel2": "field_E.y()",
"png_plugin_preChannel3": "-1.0_X * field_E.y()",
"png_plugin_period": 100,
"png_plugin_axis": "yx",
"png_plugin_slicePoint": 0.5,
"png_plugin_species_name": "electron",
"png_plugin_folder_name": "pngElectronsYX",
},
"png plugin configuration"
)
output_configuration.addToCustomInput(
{
"energy_histogram_species_name": "electron",
"energy_histogram_period": 100,
"energy_histogram_bin_count": 1024,
"energy_histogram_min_energy": 0.0,
"energy_histogram_max_energy": 1000.0,
"energy_histogram_filter": "all",
},
"energy histogram plugin configuration"
)
output_configuration.addToCustomInput(
{
"phase_space_species_name": "electron",
"phase_space_period": 100,
"phase_space_space": "y",
"phase_space_momentum": "py",
"phase_space_min": -1.0,
"phase_space_max": 1.0,
"phase_space_filter": "all",
},
"phase space plugin configuration"
)
output_configuration.addToCustomInput(
{"opnePMD_period": 100, "opnePMD_file": "simData", "opnePMD_extension": "bp"}, "openPMD plugin configuration"
)
output_configuration.addToCustomInput(
{"checkpoint_period": 100, "checkpoint_backend": "openPMD", "checkpoint_restart_backend": "openPMD"},
"checkpoint configuration"
)
output_configuration.addToCustomInput(
{"macro_particle_count_period": 100, "macro_particle_count_species_name": "electron"},
"macro particle count plugin configuration"
)
sim.picongpu_add_custom_user_input(output_configuration)
if __name__ == "__main__":
sim.write_input_file(OUTPUT_DIRECTORY_PATH)