1 / 11

NCSX Research Plan Revisited

NCSX Research Plan Revisited. M.C. Zarnstorff NCSX Physics Meeting 16 October 2003. Motivation. Several things have changed since the CDR (when we last discussed the research plan as a group) Scope changes in MIE Project initial plasma and ebeam mapping at room temperature

april-harmon
Download Presentation

NCSX Research Plan Revisited

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. NCSX Research PlanRevisited M.C. Zarnstorff NCSX Physics Meeting 16 October 2003

  2. Motivation • Several things have changed since the CDR • (when we last discussed the research plan as a group) • Scope changes in MIE Project • initial plasma and ebeam mapping at room temperature • one NB line prepared • fewer diagnostics installed • Experience on a high-beta stellarator with current: W7AS • Better understanding of stellarator device operation • importance of separating current from heating • importance of heating

  3. NCSX Research Mission Acquire the physics data needed to assess the attractiveness of compact stellarators; advance understanding of 3D fusion science. (FESAC-99 Goal) Understand… • Pressure limits and limiting mechanisms in a low-A current carrying stellarator • Effect of 3D magnetic fields on disruptions • Reduction of neoclassical transport by quasi-axisymmetric design. • Confinement scaling; reduction of turbulent transport by flow shear control. • Equilibrium islands and tearing-mode stabilization by design of magnetic shear. • Compatibility between power and particle exhaust methods and good core performance in a compact stellarator. • Energetic-ion instabilities stability in compact stellarators Demonstrate… • Conditions for high normalized pressure disruption-free operation • High pressure, good confinement, compatible with steady state

  4. Planned as: Initial operation - shake down systems Field Line Mapping 1.5MW Initial Experiments - (1.5MW NBI, partial PFCs) 3MW Heating - (3MW NBI, PFC liner) Confinement and High Beta - (~6 MW, 3rd gen. PFCs) Long Pulse – (pumped divertor) Diagnostic upgrades throughout to match research goals Phases IV – VI may last multiple years. (equipment included in MIE project cost) Research will Proceed in Phases

  5. FY-04 FY-05 FY-06 FY-07 FY-08 FY-09 Overview of Initial Research Phases • Initial Plasma • Engineering measurements and tests. • e-Beam mapping • Characterize magnetic field for research. • 1.5MW Initial Experiments • Global confinement scaling, with and without current; Density limits;Plasma evolution • Effect of low-order rational surfaces; vertical and current-driven mode stability • Initial plasma-wall interaction • 3MW Heating • Control of shape during evolution • Moderate pressure tests of stability; effect of 3D fields on disruptions • Confinement scaling; local transport; rot. damping; effects of trim coils; enhanced conf. • Effect of plasma on surface quality; neoclassical tearing • Wall coatings; characterization of wall interaction; attempts to control influx

  6. Checkout Phases

  7. III. 1.5MW Initial Experiments

  8. IV. Auxiliary Heating

  9. V. Confinement and High Beta

  10. VI. Long Pulse

  11. Before operation (FY2004-07), need to do long-term development to prepare for operation (similar to NSTX) Design and begin fabrication of diagnostic upgrades for Phase III and IV. Stellarator Edge Modeling; Design and begin fabrication of PFCs for Phase III and IV Development of discharge control strategy, modeling. Design of internal trim coils for Phase IV. Design of low-power RF loading study, for Phase IV. Research Preparation Consistent with Acquisition Execution Plan

More Related