HELENA Online Manual

Description

The Helena code solves the stationary equilibrium equations (the Grad-Shafranov equation) for a general Tokamak geometry. The code makes use of two dimensional cubic Hermite finite elements. This allows a continuous representation of both the magnetic flux and the magnetic field. The elements are isoparametric, i.e. the poloidal plane is discretised using the same cubic finite elements as used for the representation of the poloidal flux.

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Definition of Namelist Input

$SHAPE The shape of the plasma boundary

$PROFILE The shape of the equilibrium profiles

$PHYS Physics Parameters

$NUM Numerical Parameters

$PRI Output Options

$PLOT Plotting Options

$BALL Ballooning Stability

OUTPUT files

fort.20 Main output file
fort.12 Geometric data of flux surface coordinates, input file for Mishka and PB3D
fort.21 'vector' file output, used for post-processing of Mishka output
PCUBEQ The postscript output file
restart a helena input file to reproduce the same output
EQDSK mostly empty eqdsk file but with shape and profile data

EXAMPLE

Example namelist input file

Output file corresponding to above namelist input

Example unix shell script to run helena