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NSTX-U. Supported by . Discussion of T&T Contributions to FY15 JRT . Y. Ren , W. Guttenfelder, S.P. Gerhardt, S.M. Kaye. Coll of Wm & Mary Columbia U CompX General Atomics FIU INL Johns Hopkins U LANL LLNL Lodestar MIT Lehigh U Nova Photonics Old Dominion ORNL PPPL

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slide1

NSTX-U

Supported by

Discussion of T&T Contributions to FY15 JRT

Y. Ren, W. Guttenfelder, S.P. Gerhardt, S.M. Kaye

Coll of Wm & Mary

Columbia U

CompX

General Atomics

FIU

INL

Johns Hopkins U

LANL

LLNL

Lodestar

MIT

Lehigh U

Nova Photonics

Old Dominion

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

t t tsg experimental ideas
T&T TSG Experimental Ideas
  • NSTX-U will have a set of experimental knobs to vary/control pressure and current profiles
    • Two NBIs (6 independent sources), HHFW, 3D coils and lithium deposition
      • Different pressure and current profiles from using a subset of the 6 NBI sources
      • Heating/current drive from HHFW with NBI or used independently
      • 3D coils used to modify rotation profile coupled with NBI
      • Different profiles with/without lithium
    • Need to identify ways to decouple pressure and current profile variations
      • Different time scales of pressure and current profile relaxation
      • HHFW in heating mode
t t tsg experimental ideas1
T&T TSG Experimental Ideas
  • Some first year T&T researches to support the FY15 JRT
    • qmin dependence of confinement with fixed q95
      • DIII-D observation of degraded confinement with broader current profile and with q95 fixed
    • BT, Ip and collisionalityscalings with different NBI source combinations and HHFW
      • Try to decouple pressure and current profile effects
      • 3D coils to modify rotation profile
    • Lithium scan to vary pressure and current profile
      • Need to assess the coupling between pressure and current profile
    • Lithiated and non-lithiated plasma comparison
      • Confinement and pressure profiles are known to be different between the cases from NSTX experiments