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        "author": "Ben Dudson",
        "author_email": "benjamin.dudson@york.ac.uk",
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        "classifiers": [
            "Development Status :: 3 - Alpha",
            "Intended Audience :: Science/Research",
            "License :: OSI Approved :: GNU Lesser General Public License v3 or later (LGPLv3+)",
            "Natural Language :: English",
            "Operating System :: OS Independent",
            "Programming Language :: Python",
            "Topic :: Scientific/Engineering :: Physics",
            "Topic :: Software Development :: Libraries :: Python Modules"
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        "description": "FreeGS: Free boundary Grad-Shafranov solver\n===========================================\n\n[![License](https://img.shields.io/badge/license-GPL-blue.svg)](https://img.shields.io/badge/license-GPL-blue.svg)\n[![py3comp](https://img.shields.io/badge/py3-compatible-brightgreen.svg)](https://img.shields.io/badge/py3-compatible-brightgreen.svg)\n\nThis Python module calculates plasma equilibria for tokamak fusion experiments,\nby solving the Grad-Shafranov equation with free boundaries. Given a set of coils,\nplasma profiles and shape, FreeGS finds the currents in the coils which produce\na steady-state solution in force balance.\n\n**Note** This is a work in progress, and probably contains bugs. \nThere is a feature wishlist in issues, suggestions and contributions welcome!\n\nInstalling\n----------\n\nFreeGS is available on PyPI \n\n    $ pip install --user freegs\n\nor clone/download this repository and run setup:\n\n    $ git clone https://github.com/bendudson/freegs.git\n    $ cd freegs\n    $ python setup.py install --user\n\nDocumentation\n-------------\n\nThe manual is in the `docs` subdirectory, and [hosted here on readthedocs](http://freegs.readthedocs.io/en/latest/).\n\nExamples\n--------\n\nThe Jupyter notebooks contain examples wuth additional notes\n\n* MAST-example.ipynb \n\nThere are also some Python scripts to run short tests\nand examples\n\n    $ python 01-freeboundary.py\n\nThis solves a free boundary problem, specifying the desired location of two X-points.\nWrites the equilibrium to a G-EQDSK file \"lsn.geqdsk\"\n\n    $ python 02-read-geqdsk.py\n\nReads in the file \"lsn.geqdsk\", inferring the coil currents from the plasma boundary\nand profiles in the G-EQDSK file.\n\n    $ python 03-mast.py\n\nCalculates a double-null (CDND) equilibrium for MAST from scratch. Writes solution to\nG-EQDSK file \"mast.geqdsk\"\n\n    $ python 04-read-mast-geqdsk.py\n\nReads the file \"mast.geqdsk\", inferring the coil currents.\n\n    $ python 05-fixed-boundary.py \n\nThis example solves a fixed boundary problem, in which the square edges of the domain\nare fixed. The plasma pressure on axis and plasma current are fixed.\n\n    $ python 06-xpoints.py\n\nThis demonstrates the coil current control code, finding X-points, and marking core region\nThese routines are used inside the free boundary solver\n\nFiles\n-----\n\nThe \"freegs\" module consists of the following files:\n\n* **boundary.py**        - Operators for applying boundary conditions to plasma psi\n* **control.py**         - Routines for controlling coil currents based on constraints\n* **critical.py**        - Finds critical points (O- and X-points)\n* **equilibrium.py**     - Represents the plasma equilibrium state\n* **gradshafranov.py**   - Greens functions and operators for the Grad-Shafranov equation\n* **jtor.py**            - Routines for calculating toroidal current density (profiles)\n* **machine.py**         - Represents the coils and power supply circuits\n* **multigrid.py**       - The multigrid solver for the linear elliptic operator\n* **picard.py**          - Nonlinear solver, iterating the profiles and constraints\n* **plotting.py**        - Plotting routines using matplotlib\n\nLicense\n-------\n\n    Copyright 2016-2018 Ben Dudson, University of York. Email: benjamin.dudson@york.ac.uk\n\n    This program is free software: you can redistribute it and/or modify\n    it under the terms of the GNU Lesser General Public License as published by\n    the Free Software Foundation, either version 3 of the License, or\n    (at your option) any later version.\n\n    This program is distributed in the hope that it will be useful,\n    but WITHOUT ANY WARRANTY; without even the implied warranty of\n    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n    GNU Lesser General Public License for more details.\n\n    You should have received a copy of the GNU Lesser General Public License\n    along with this program.  If not, see <http://www.gnu.org/licenses/>.\n\nReferences\n----------\n\n* YoungMu Jeon, [Development of a free boundary Tokamak Equlibrium Solver](http://link.springer.com/article/10.3938/jkps.67.843)  [arXiv:1503.03135](https://arxiv.org/abs/1503.03135)\n* S.Jardin \"Computational Methods in Plasma Physics\" CRC Press\n\n\nVersions\n--------\n\n0.2.0  12th March 2019\n  - Add field line tracer, `freegs.fieldtracer`\n  - Add Equilibrium.Btor toroidal field calculation\n  - Add Equilibrium.plasmaVolume\n  - Fix rlim, zlim saved into GEQDSK files\n\n\n\n",
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