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PHARE is a Hybrid Particle-In-Cell (PIC) code. It solves the evolution of the Vlasov equationof an arbitrary number of ion populations in a Lagrangian way. Electrons are modeled as a single fluid.Their momentum equation is used to compute the electric field, assuming quasineutrality.

Using Adaptive Mesh Refinement, provided by the librarySAMRAI,PHARE aims at filling the gap between sub-ion scales and large "MHD" scales by increasing the meshresolution wherever the solution needs it.

WARNING - PHARE is under development ;-)

PHARE is an open-source projet licenced under the GPLv3. Please refer toLICENCE.TXT

Basic tools and library requirements:

- git- cmake- make/ninja- C++ and Fortran compiler- MPI- Parallel HDF5- Python 3.x devel package

PHARE input and post-processing scripts are in python. Install dependencies with:

  python3 -m pip install -r requirements.txt

PHARE depends onSAMRAI to manage the adaptive mesh refinement. You can either

• build PHARE with the latest version ofSAMRAI:

  mkdir build; cd build; cmake ..; make

• build PHARE with a pre-installed version ofSAMRAI:

  mkdir build; cd build; cmake .. -DSAMRAI_ROOT=/path/to/SAMRAI/install; make

• https://phare.readthedocs.io/en/latest/

All contributions are welcome. If you are interested in participating to the project for an internship, PhD, PostDoc,contact us.

For system library requirements see the followingDocker File

• Nicolas Aunai
• Philip Deegan
• Roch Smets
• Andrea Ciardi

• Thibault Payet

To cite PHARE :

@article{AUNAI2024108966,title ={PHARE: Parallel hybrid particle-in-cell code with patch-based adaptive mesh refinement},journal ={Computer Physics Communications},volume ={295},pages ={108966},year ={2024},issn ={0010-4655},doi ={https://doi.org/10.1016/j.cpc.2023.108966},url ={https://www.sciencedirect.com/science/article/pii/S0010465523003119},author ={Nicolas Aunai and Roch Smets and Andrea Ciardi and Philip Deegan and Alexis Jeandet and Thibault Payet and Nathan Guyot and Loic Darrieumerlou},keywords ={Particle in cell, Adaptive mesh refinement, Collisionless plasmas},}

• ArXiv free version of PHARE's CPC paper
• Particle Splitting: Roch Smets et al.A new method to dispatch split particles in Particle-In-Cell codes. Computer Physics Communications, 2021, 261, pp.107666. ⟨10.1016/j.cpc.2020.107666⟩. (Free Version here)

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We acknowledge support from:

• Plas@Par
• Laboratory of Plasma Physics (LPP)
• LERMA
• CNES
• CIEDS andAID