Several task forces are used to help guide the planning of the C-Mod
experimental program. Contirbutors are encouraged to contact the appropriate coordinators
about their ideas.
|
Task Force |
Coordinator |
Description |
|
Integrated
Scenarios |
Research aimed at
reaching attractive operating points, generally cutting across multiple
science topics and often involving interaction and compatibility issues between
different plasma processes or regions. Naturally, there is considerable
topical overlap between the IS areas and the various science areas. |
|
IS: H-mode Baseline |
Steve
Wolfe |
Issues related to
conventional H-mode as baseline operational scenario for ITER: projection
of H-mode threshold, pedestal scalings and ELM behavior; confinement
optimization; startup and heating schemes; H-mode fueling and density control;
density limits; wall materials choices; divertor and first wall heat loads;
disruption mitigation. |
|
IS: Advanced Scenarios |
Amanda
Hubbard |
Additional issues related
to hybrid and steady-state scenarios: access to hybrid scenario with
coupled electrons/ions using lower hybrid current drive; formation and
control of internal transport barriers; control of transport barriers
through current profile control; RF Flow drive; current profile
modification techniques other than LHCD; j(r) measurements; long
pulse power handling. |
|
Topical
Science Areas |
|
|
Lower Hybrid |
Randy
Wilson (PPPL) |
Covers issues associated
with: improvements to LH launcher operation; preparing suitable H-mode
target plasmas for LHCD; launching and absorption of LH waves; direct LH
effects including heating and current drive; interactions between LH and
ICRF. |
|
ICRF |
Yijun
Lin |
ICRF issues include: wave
propagation and absorption; mode conversion; directed waves and current
drive; general wave-particle interactions and those that provoke a unique
plasma response (e.g. ITB's); antenna behavior and RF interactions with
material surfaces. |
|
Transport |
Martin
Greenwald |
The transport program
includes: studies of edge fluctuations and stability including EDA and ELMy
H-modes and the role of turbulent transport in the density limit; the L/H
threshold and transition dynamics; the role of critical gradients and
marginal stability in core transport; ITB thresholds, dynamics, sustainment
and control; the origin and role of rotation in systems without direct
momentum sources; and particle and impurity transport. |
|
Divertor/Edge |
Brian
LaBombard |
The divertor/edge program
includes: studies of main chamber and divertor recycling; SOL transport,
turbulence and scalings; divertor power handling, plasma/surface
interactions and impurity generation; the physics of detachment, volume
recombination processes, opacity, and modeling of the divertor and edge. |
|
MHD |
Bob
Granetz |
The MHD task force covers
MHD instabilities and disruptions. |
|
Basic Science |
Jim
Irby |
The Basic Science area
includes atomic physics and astrophysics-relevant studies that utilize the
plasma as a well diagnosed, hot light source. |
|
Diagnostic Development |
Jim
Irby |
The diagnostic
development area includes proposals for novel plasma diagnostics for implementation
on C-Mod; improvements to existing diagnostic capability; and ideas for
improved calibration or analysis techniques. |
| Operations |
Jim Irby |
Covers experiments that impact machine operation: including specialized uses of the digital plasma control system; startup optimization; and evaluation of new wall-conditioning techniques. |
|
Pedestal
|
Jerry Hughes
|
The Pedestal Task Force addresses edge transport barriers (pedestals) in high confinement regimes, and how the structure of such barriers is influenced by both edge transport and gradient-limiting ELMs. Increasing focus is being placed on experimental tests of predictions from theory. |
