A. “Structure
and dynamics of internal transport barriers“
- Physics mechanisms which trigger internal transport barriers
- Role of transport and stability in spatial structure of
internal transport barriers
- Similarities and differences between machines and magnetic
geometries
- Ion and electron barriers and the similarities and differences
between them
B. “Structure and dynamics of
the H-mode pedestal”
- Studies, integrating stability and transport, to discuss
what we know about
the physics which determines the pedestal structure
- Similarities and differences between machines
- ELM models and comparison to experiment
- ELM-free or small ELM regimes, such as EDA, QH-mode and
Type II
C. “Understanding transport
barriers through modeling”
- Modeling of core and edge barriers
- Comparison of models with experiment.
- Ways in which modeling has advanced our physics understanding
of barriers
- Development of transport barrier models for burning plasma
devices, particularly ITER
D. “Control of transport barriers”
- Empirical methods that have been used to control barriers
(edge and core)
- Comparison of control techniques as used on various machines
and in different
magnetic geometries.
- Hybrid operating modes, providing long pulse operation,
on the various machines.
- Relevance of different control strategies to ITER and
other burning plasma machines
E. “Transport within transport
barriers: theorist's view of the future”
- Theoretical studies of transport within transport barriers
- Assessment of theory work which must be done to advance
our knowledge of transport in core and edge barriers
- Theory of important physics elements:
- Turbulence saturation mechanisms in barriers
- Zonal flows and geodesic acoustic modes
- Differences between mechanisms for setting particle vs
temperature gradients
- Competition between transport and small scale MHD, such
as QC and EHO modes
F. “Diagnostic and analysis
issues for transport barriers”
- Measurement needs for barriers (core and edge)
- Recent advances in diagnostics or data analysis
- Needs for diagnostic and analysis improvements to advance
barrier studies
- Needs for ITER and other next step devices
- Possibly coupled to the issue of control
