MEGPy: Magnetic Equilibrium Geometry Python

MEGPy is a package for quick extraction of (local) equilibrium quantities and visualisation of 2D magnetic equilibria used in magnetic confinement fusion research. It offers both a command line interface (CLI) and Python API.

Getting started

To get MEGPy clone and install the latest version:

$ git clone git@github.com:gsnoep/megpy.git
$ cd megpy
$ pip install --user -e .

To use MEGPy call the CLI:

$ python -m megpy <file_path> <parameterization> <x_fs>

For details on the CLI options:

$ python -m megpy -h

Or use the Python API, of which some examples can be found in /examples/.

Join the repository to contribute or raise issues!

Supported equilibrium formats

• EQDSK (g-file) from EFIT, ESCO, CHEASE or LIUQE
• EX2GK pickle file
• IMAS equilibrium IDS

To be added:

• VMEC

Supported flux-surface geometries

• Miller (doi)
• Turnbull-Miller (doi)
• Fourier / generalised Miller (doi)
• Miller eXtended Harmonic (MXH) (doi)

Citation

If you use MEGPy in your research, please cite (bibtex):

G. Snoep, J.T.W. Koenders, C. Bourdelle, J. Citrin and JET contributors, "Improved flux-surface parameterization through constrained nonlinear optimization," Physics of Plasmas 30, 063906 (2023)

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