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How to run a new simulation
===========================
After compiling the code (see the section :doc:`../installation`), the
WarpX executable is stored in the folder ``warpx/Bin``. (Its name starts
with `main` but depends on the compiler options.)
In order to run a new simulation:
* Create a **new directory**, where the simulation will be run.
* Copy the **executable** to this directory:
::
cp warpx/Bin/<warpx_executable> <run_directory>/warpx.exe
where ``<warpx_executable>`` should be replaced by the actual name
of the executable (see above) and ``<run_directory>`` by the actual
path to the run directory.
* Add an **input file** in the directory.
This file contains the numerical and physical parameters that define
the situation to be simulated.
Example input files can be found in the section :doc:`examples`.
The different parameters in these files are explained in the section
:doc:`parameters`.
* **Run** the executable:
::
mpirun -np <n_ranks> ./warpx.exe <input_file>
where ``<n_ranks>`` is the number of MPI ranks used, and ``<input_file>``
is the name of the input file.
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