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PPPL, room B318 Dec. 6 th , 2013

Discussion on FY2015 JRT “ Impact of broadened current and pressure profiles on tokamak plasma confinement and stability”. PPPL, room B318 Dec. 6 th , 2013.

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PPPL, room B318 Dec. 6 th , 2013

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  1. Discussion on FY2015 JRT“Impact of broadened current and pressure profiles on tokamak plasma confinementand stability” PPPL, room B318 Dec. 6th, 2013 Goals of this meeting:- Identify NSTX-U contributions to FY2015 JRT- Provide input for DIII-D/NSTX-U research coordination meeting (Tue. 12/10)

  2. Agenda • FY2015 JRT text - Podestà, 2:00-2:10pm • Contributions from NSTX-U TSG’s: • Advanced Scenarios & Control - Gerhardt, 2:10-3:30pm • Waves and Energetic Particles - Podestà, 2:30-2:50pm • Turbulence and Transport - Ren, 2:50-3:10pm • Macroscopic Stability - Berkery, 3:10-3:30pm • Group discussion NSTX-U discussion on FY2015 JRT

  3. FY2015 JRT (draft?) text Conduct experiments and analysis to quantify the impact of broadened current and pressure profiles on tokamak plasma confinement and stability. Broadened pressure profiles generally improve global stability but can also affect transport and confinement, while broadened current profiles can have both beneficial and adverse impacts on confinement and stability. This research will examine a variety of heating and current drive techniques in order to validate theoretical models of both the actuator performance and the transport and global stability response to varied heating and current drive deposition. NSTX-U discussion on FY2015 JRT

  4. Suggested Interpretation • Do our H&CD (and momentum) actuators operate the way we thing they should? For instance: • *AE physics? • Verification of classical beam physics otherwise? • Given actuator performance, what is the transport response? For instance: • Dependence of transport on variations in qmin, rotation? • Ability to actually control qmin and W given confinement changes? • Given actuator performance and the transport response, how can we use actuators to optimize the global stability? For instance: • Vertical controllability? • n>=1 RWM through kinetic effects? • core MHD through q-profile control? NSTX-U discussion on FY2015 JRT

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