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1. Open the file  gsl_config.sh  and set the value of the variable HOME to the GSL source directory location.
2. Type
   module load imasenv/3.37.0    
3. Create the required IMAS entry:
   imasdb eirene Type 
   . ./gsl_config.sh 
4. Now you can compile the examples. Type
   make clean 
make save 
   OR type
   ifort triangular_grid_module.f90 trangular_grid_ids_io.f90 save_grid.f90 -o save_grid.exe ${PKG_PART  }_input 
5. Run the program:
   ./save_gridinput.exe 
   The program puts the grid stored in the files soledge3x.* into the IDS  edge_profiles   of the IMAS database  eirene .the files soledge3x.* and the data files ???? into the IMAS database  eirene .
6. Type
   make provide_input Type
   make recover 
   OR type
   ifort triangular_grid_module.f90 trangular_grid_ids_io.f90 recover_grid.f90 -o recover_grid.exe ${PKG_PART  }
7. Run the program:
   ./recoverprovide_gridinput.exe 
   Compare the new files  eirene.*   with the original files  soledge3x.* . . ??????????????????

Storing EIRENE triangular grids in IMAS

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We will follow the terminology of the GGD manual. The IMAS data dictionary is a hierarchical tree-like structure consisting of substructures. The following terms will be used:

• A  A node   is any element of the tree.
• A   simple node   is a regular single node.
• An   array of structures node (AOS)   is a 1D array of structures under the same node label.
• A   leaf   is and endpoint of the tree. It holds data in specified format.
• The   parent   of a node is the element one level above this node.
• A   child   of a node is an element one level below this node.
• A   sibling   of a node is a node having the same parent.

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The module contains routines that support writing a grid having the  type(triangular_grid)  form to IMAS IDS's and, vice versa, reading a grid from IMAS and putting it into the   type(triangular_grid)  form. It depends on the module  triangular_grid_module   and the IMAS modules  ids_schemas   and  ids_routines .

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