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.. _usage-examples:
Examples
========
This section allows you to **download input files** that correspond to different physical situations.
We provide two kinds of inputs:
* AMReX ``inputs`` files, :ref:`with parameters described here <running-cpp-parameters>`,
* PICMI python input files, `with parameters described here <https://picmi-standard.github.io>`__.
For a complete list of all example input files, have a look at our ``Examples/`` directory.
It contains folders and subfolders with self-describing names that you can try. All these input files are automatically tested, so they should always be up-to-date.
Beam-driven electron acceleration
---------------------------------
AMReX ``inputs``:
* :download:`2D case <../../../Examples/Physics_applications/plasma_acceleration/inputs_2d>`
* :download:`2D case in boosted frame <../../../Examples/Physics_applications/plasma_acceleration/inputs_2d_boost>`
* :download:`3D case in boosted frame <../../../Examples/Physics_applications/plasma_acceleration/inputs_3d_boost>`
PICMI:
* :download:`Without mesh refinement <../../../Examples/Physics_applications/plasma_acceleration/PICMI_inputs_plasma_acceleration.py>`
* :download:`With mesh refinement <../../../Examples/Physics_applications/plasma_acceleration/PICMI_inputs_plasma_acceleration_mr.py>`
Laser-driven electron acceleration
----------------------------------
AMReX ``inputs``:
* :download:`2D case <../../../Examples/Physics_applications/laser_acceleration/inputs_2d>`
* :download:`2D case in boosted frame <../../../Examples/Physics_applications/laser_acceleration/inputs_2d_boost>`
* :download:`3D case <../../../Examples/Physics_applications/laser_acceleration/inputs_3d>`
PICMI files:
* :download:`Without mesh refinement<../../../Examples/Physics_applications/laser_acceleration/PICMI_inputs_laser_acceleration.py>`
Plasma mirror
-------------
:download:`2D case <../../../Examples/Physics_applications/plasma_mirror/inputs_2d>`
Laser-ion acceleration
----------------------
:download:`2D case <../../../Examples/Physics_applications/laser_ion/inputs>`
.. note::
The resolution of this 2D case is extremely low by default.
You will need a computing cluster for adequate resolution of the target density, see comments in the input file.
Uniform plasma
--------------
:download:`2D case <../../../Examples/Physics_applications/uniform_plasma/inputs_2d>`
:download:`3D case <../../../Examples/Physics_applications/uniform_plasma/inputs_3d>`
Capacitive discharge
--------------------
The Monte-Carlo collision (MCC) model can be used to simulate capacitive discharges between parallel plates. The implementation has been tested against the benchmark results from Turner et. al. in `Phys. Plasmas 20, 013507, 2013 <https://aip.scitation.org/doi/abs/10.1063/1.4775084>`_. The figure below shows a comparison of the ion density as calculated in WarpX (in June 2021) compared to the literature results (which can be found `here <https://aip.scitation.org/doi/suppl/10.1063/1.4775084>`__). An input file with parameters for the 1st case is given below except the total simulation steps have been reduced.
.. figure:: https://user-images.githubusercontent.com/40245517/123883650-4f614680-d8fe-11eb-9302-92a282191e8f.png
:alt: MCC benchmark against Turner et. al. (2013).
:width: 80%
* :download:`test case 1 <../../../Examples/Physics_applications/capacitive_discharge/inputs_2d>`
.. note::
This example needs `additional calibration data for cross sections <https://github.com/ECP-WarpX/warpx-data>`__.
Download this data alongside your inputs file and update the paths in the inputs file:
.. code-block:: bash
git clone https://github.com/ECP-WarpX/warpx-data.git
Test cases
----------
PICMI test cases included that can be used as a reference:
* :download:`Gaussian beam <../../../Examples//Modules/gaussian_beam/PICMI_inputs_gaussian_beam.py>`
* :download:`Langmuir plasma wave test in 3d <../../../Examples//Tests/Langmuir/PICMI_inputs_langmuir_rt.py>`
* :download:`Langmuir plasma wave test in RZ <../../../Examples//Tests/Langmuir/PICMI_inputs_langmuir_rz_multimode_analyze.py>`
* :download:`Langmuir plasma wave test in 2D <../../../Examples//Tests/Langmuir/PICMI_inputs_langmuir2d.py>`
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