grrr is a numerical code to simulate high energy particles in atmospheric physics. In particular it was designed to simulate electrons moving in a self-consistent electric field, as described in [Luque2014].
You can download the grrr code from its
main repository <https://github.com/aluque/grrr>. The simulations in
the paper were produced with the commit tagged HEAP (hash
3886b58b68e5da359babb66906bde3be9883b307).
grrr is mostly written in Python but the time-critical parts are written in a C library that you have to compile. You can do it with:
make
This will produce a file named libgrrr.so that will be loaded at runtime. Therefore it must be visible to your dynamic linker. In Linux system you can make sure that this is the case by setting LD_LIBRARY_PATH:
export LD_LIBRARY_PATH=path/to/grrr
In a Mac OS X system change that to:
export DYLD_LIBRARY_PATH=path/to/grrr
Note that grrr requires at least Python 3.0 and a few Python libraries: numpy, scipy, matplotlib, h5py, and PyYAML.
| [Luque2014] | Relativistic Runaway Ionization Fronts, A. Luque, Physical Review Letters, 112, 045003 doi:10.1103/PhysRevLett.112.045003 (2014). |