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NSTX-U Collaboration Status and Plans for: General Atomics Edge Physics Grant (2014-18)

NSTX-U Collaboration Status and Plans for: General Atomics Edge Physics Grant (2014-18). T. E. Evans , T. H. Osborne, N. M. Ferraro, P. B. Snyder, W. Wu and Post doc (TBD). NSTX-U Collaborator Research Plan Meetings PPPL – LSB B318 April 24, 2014. NSTX-U.

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NSTX-U Collaboration Status and Plans for: General Atomics Edge Physics Grant (2014-18)

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  1. NSTX-U Collaboration Status and Plans for: General Atomics Edge Physics Grant (2014-18) T. E. Evans, T. H. Osborne, N. M. Ferraro, P. B. Snyder, W. Wuand Post doc (TBD) NSTX-U Collaborator Research Plan Meetings PPPL – LSB B318 April 24, 2014 NSTX-U

  2. Research plans and needs for this year (FY2014) in preparation for NSTX-U operations in FY2015 • Improve elite for low n and low aspect ratio • Integrate eliteinto NSTX-U pedestal analysis toolkit • Improve edge stability analysis efficiency and general ease of use • Assistance implementing infrastructure for NSTX-U data access in elite • Update trip3d and trip3d-gpu divertor models • Implement invariant manifold and field-error simulation capability • Detailed specifications of NSTX-U plasma facing surfaces and divertor imaging systems • Initial NCC vacuum and plasma response modeling • Install m3d-c1capable version of trip3d-gpu on PPPL GPU machines • Continue initial m3d-c1based NTV torque simulations using ntvtok (S. Sabbagh) on NSTX shot 133726 • Initiate m3d-c1based NTV torque studies of NSTX data with a range of collisionalities • Access to PPPL computers and NSTX/NSTX-U data 2

  3. Research Plans for FY2015-18 • Compare NSTX-U results to eped1.0 and eped1.6 • Improve eped KBM model based on gyro-kinetic simulations in comparison to NSTX-U data (2015-16) • Apply pedestal stability and structure models to snowflake, RMP and Li discharges in NSTX-U (2016-17) • Evaluate the effect of Li wall coating on pedestal structure and stability (2017-18) • Carry out m3d-c1based trip3d-gpu simulations of NSTX-U discharges • Compare simulations of divertor footprints to NSTX-U divertor imaging data with and without 3D fields from field-error models (2015-16) • Simulate resonant flow screening and amplification effects with NCC current ramps and compare to experimental data (2016-17) • Propose experiments to validate high-resolution divertor footprint simulations (2017-18)

  4. Research Plans for FY2015-18 • Carry out m3d-c1based trip3d-gpu simulations of full and partial NCC • Simulate plasma response with a range of NCC configurations (2015-16) • Simulate resonant flow screening and amplification using NCC configurations from selected NSTX-U experiments and compare to plasma response data (2016-17) • Propose ELM suppression experiments using the NCC based on plasma response simulation results (2017-18) 4

  5. Ideas to enhance participation in NSTX-U research/program by U.S. Universities, early-career researchers, and students • Identify graduate and undergraduate ‘independent research’ projects to be done for academic credit – for example: • Compile a database of NSTX-U discharges with a particular type of characteristic (e.g., low electron pedestal collisionality) • Create a MatLab program to visualize experimental data • Develop or improve plasma analysis software • Develop a plan for an experiment to address a specific physics goal 5

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