• Assess active and passive RWM stabilization physics for improved mode control (R09-1)
• Evaluate MHD sources of plasma viscosity and assess the impact of plasma rotation on plasma stability, including NTM (Joule milestone)

Joule Milestone (2008): Evaluate the generation of plasma rotation and momentum transport, and assess the impact of plasma rotation on stability and confinement

Conduct experiments on major fusion facilities leading toward the predictive capability for burning plasmas and configuration optimization. In FY08, FES will evaluate the generation of plasma rotation and momentum transport, and assess the impact of plasma rotation on stability and confinement. Alcator C-Mod will investigate rotation without external momentum input, NSTX will examine very high rotation speeds, and DIII-D will vary rotation speeds with neutral beams. The results achieved at the major facilities will provide important new data for estimating the magnitude of and assessing the impact of rotation on ITER

FY2009 Milestone (R09-1): Further understand the physics of RWM stabilization and control as a function of plasma rotation

Key Physics Topics

• Resistive wall mode physics and stabilization
• Tearing mode/NTM physics
• Non-axisymmetric field-induced plasma viscosity
• Mode-induced disruption physics and mitigation
• Dynamic error field correction
• High plasma shaping and global stability

Coordinated research proposed with other devices for 2008

Proposed DIII-D/NSTX joint experiment 324 on NTV rotation physics

Proposed DIII-D/NSTX joint experiment 325 on RWM stabilization physics

ITPA/USBPO Participation

• MDC-2 Joint experiments on resistive wall mode physics
• MDC-3 Joint experiments on neoclassical tearing modes including error field effects
• MDC-12 Non-resonant magnetic braking
• ITER issue card RWM-1 Resistive wall mode stabilization coils
• ITER issue card AUX-1 Increasing rotation in ITER
• USBPO MHD task force initiative on ITER RWM coil design

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