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NSTX-U. Supported by . Macroscopic Stability (MS) Research Progress and Plans. Jong-Kyu Park (PPPL) J. W. Berkery (Columbia University) A. H. Boozer (Columbia University) and the NSTX Research Team. Coll of Wm & Mary Columbia U CompX General Atomics FIU INL Johns Hopkins U LANL

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slide1

NSTX-U

Supported by

Macroscopic Stability (MS) Research Progress and Plans

Jong-Kyu Park (PPPL)

J. W. Berkery (Columbia University)

A. H. Boozer (Columbia University)

and the NSTX Research Team

Coll of Wm & Mary

Columbia U

CompX

General Atomics

FIU

INL

Johns Hopkins U

LANL

LLNL

Lodestar

MIT

Lehigh U

Nova Photonics

ORNL

PPPL

Princeton U

Purdue U

SNL

Think Tank, Inc.

UC Davis

UC Irvine

UCLA

UCSD

U Colorado

U Illinois

U Maryland

U Rochester

U Tennessee

U Tulsa

U Washington

U Wisconsin

X Science LLC

Culham Sci Ctr

York U

Chubu U

Fukui U

Hiroshima U

Hyogo U

Kyoto U

Kyushu U

Kyushu Tokai U

NIFS

Niigata U

U Tokyo

JAEA

Inst for Nucl Res, Kiev

Ioffe Inst

TRINITI

Chonbuk Natl U

NFRI

KAIST

POSTECH

Seoul Natl U

ASIPP

CIEMAT

FOM Inst DIFFER

ENEA, Frascati

CEA, Cadarache

IPP, Jülich

IPP, Garching

ASCR, Czech Rep

NSTX-U MS TSG discussion

B252, PPPL

July 13, 2012

discussion for ms chapter in nstx u five year plan
Discussion for MS chapter in NSTX-U Five-year plan
  • First need to develop very clear thrusts
  • Need to reshuffle plans under each thrust, to modify and improve chapter outline
  • Define a draft list of lead and co-authors for each chapter for writing
  • Complete the draft time-line for MS chapter
thrusts for ms research
Thrusts for MS research
  • Presently we have
    • Beta and profile control support, expected impact on stability
    • Error field identification and control
    • RWM – passive stability and active control
    • NTV: 3D field effects on equilibrium, transport, turbulence, etc
    • Disruption physics, detection, and mitigation
  • Need more definitive thrusts. Possibly,
    • For stability physics and control (Steve, Jack?)
    • For 3D field physics (JK, Boozer, Menard?)
    • For disruption detection and mitigation (Stefan, Roger?)
plans related to stability and control
Plans related to stability and control
  • Year 1
    • Recover and explore NSTX MS control capabilities
    • Assess the βN or q limit with new shaping control and off-axis NBCD
    • Recover and upgrade RWM Bp+Brand state space control with SPAs, including n>1 and multi-mode control
  • Year 2
    • Validate RWM physics in reduced ν* and varied fast ion populations
    • Utilize off-axis NBCD to vary q-profile and applies to RWMs and tearing modes
  • Year 3
    • Optimize rotation feedback control for improving RWM and TM stability
    • Assess and optimize tradeoffs between q, rotation, β to improve stability
    • Explore the lowest ν* regimes and optimize RWM and TM stability
  • Year 4
    • Combine rotation and β feedback control to maximize performance
    • Provide FNSF/Pilot projection on RWM and TM stability and disruption
  • Year 5
    • Integrate MS control to avoid RWM, TM, ELM instability, disruption, with disruption mitigation protection
    • Integrate validation of models for FSNF/Pilot
plans related to 3d field physics
Plans related to 3D field physics
  • Year 1
    • Recover and explore NSTX MS control capabilities
    • Identify n=1,2,3 error fields and optimize corrections with new SPAs
  • Year 2
    • Explore NTV physics with new NBIs and SPAs
    • Begin implementation of rotation control with new NBIs and SPAs
  • Year 3
    • Optimize rotation feedback control for improving RWM and TM stability
    • Assess and optimize tradeoffs between q, rotation, β to improve stability
  • Year 4
    • Combine rotation and β feedback control to maximize performance
  • Year 5
    • First use of NCC (if resources permitting)
    • Integrate MS control to avoid RWM, TM, ELM instability, disruption, with disruption mitigation protection
    • Integrate validation of models for FSNF/Pilot
plans related disruption detection and mitigation
Plans related disruption detection and mitigation
  • Year 1
    • Revisit disruptivity and study halo current dynamics and heat loads on divertor
    • Apply MGI mitigation and explore dependency on injection locations
  • Year 2
    • Identify disruption characteristics in various scenarios obtained by off-axis NBCD
    • Test and optimize MGI techniques by varying positions and actuators
  • Year 3
    • Explore disruption precursors and avoidance scenarios with various MHD origins
    • Explore MGI triggering for real-time actuation for disruption mitigation
  • Year 4
    • Provide FNSF/Pilot projection on RWM and TM stability and disruption
    • Couple MGI triggering techniques to mitigate disruptions
  • Year 5
    • Integrate MS control to avoid RWM, TM, ELM instability, disruption, with disruption mitigation protection
    • Integrate validation of models for FSNF/Pilot
theory simulation diagnostics
Theory/Simulation/Diagnostics
  • For theory and simulation, presently we have only
    • VALEN
    • IPEC
  • Key diagnostics, presently we have (Presented in PAC 31)
    • Real-Time Velocity measurement
    • Toroidally displaced MESXR
    • Core X-ray imaging spectrometer
    • Internal magnetic fluctuation measurement
    • Real-Time MSE and MPTS
    • Refurbishment of magnetic sensors including Bp and Br
non axisymmetric control coil ncc
Non-axisymmetric Control Coil (NCC)
  • Need to do the actual analysis on
    • Rotation control (NTV)
    • RWM active control (VALEN3D, done for NSTX)
    • RWM kinetic stabilization (MISK)
    • Error Field Correction (IPEC)
    • ELM control and stabilization (TRIP3D is done for NSTX)
    • Simultaneous control
    • Prediction for ITER 3D coil capabilities
  • Need to launch NCC coil design activities?
    • Set up coil geometries (for instance, 2 options from Steve)
    • Set up NSTX-U targets (a couple of targets from Stefan)
    • Analysis plans (codes, responsible persons)
      • IPEC (JK), NTV (Kimin), RWM dWk (Jack), TRIP3D (YS), VALEN3D (Jim), etc?