  Built around the SMARDDA modules for magnetic field-line tracing [IEEE Tr.
Plasma Sc. 42 (2014) 1932], the SMITER code package (SMARDDA for ITER) is a new
graphical user interface (GUI) framework for power deposition mapping on
tokamak plasma-facing components (PFC) in the full 3-D CAD geometry of the
machine, taking as input a user-defined specification for parallel heat flux in
the scrape-off layer (SOL) and a description of the equilibrium magnetic flux.
The software package provides CAD model import and integration with the ITER
Integrated Modelling and Analysis Suite (IMAS), parametric CAD components
catalogue and modelling, CAD de-featuring for PFC surface extraction, meshing,
visualization (using an integrated ParaView module), Python scripting and batch
processing, storage in hierarchical data files, with several simulation cases
in one study running in parallel and using message passing interface (MPI) for
code speed-up. An integrated ParaView module can combine CAD geometry, magnetic
field equilibrium, meshes and results for detailed setup analysis and a module
is under development for full finite element computation of surface
temperatures resulting from the power deposition patterns on 3-D PFCs. The code
package has been developed for ITER, but can be deployed for similar modelling
of any tokamak. This paper presents and discusses key features of this
field-line tracing environment, demonstrates benchmarking against existing
field-line tracing code and provides specific examples of power deposition
mapping in ITER for different plasma configurations.

Plasma Physics