Confinement and Local Transport in the National Spherical Torus Experiment (NSTX) Stanley M. Kaye 1 , M.G. Bell 1 , R.E. Bell 1 , C. W. Domier 2 , W. Horton 3 , J. Kim 3 , B.P. LeBlanc 1 , F. Levinton 4 ,N.C. Luhmann 2 , R. Maingi 5 , E. Mazzucato 1 , J.E. Menard 1 , D.R. Mikkelsen 1 , H. Park 1 , G. Rewoldt 1 , S.A. Sabbagh 6 , D. Smith 1 , D. Stutman 7 , K. Tritz 7 , W. Wang 1 , H. Yuh 4 21 st IAEA/Fusion 2006 Meeting Oct 16 – 21, 2006 Chengdu, China 1 PPPL, Princeton University, Princeton, NJ, USA 08543 2 University of California, Davis, CA, USA 95616 3 IFS, University of Texas, Austin, TX, USA 78712 4 Nova Photonics Inc., Princeton, NJ, USA, 08540 5 ORNL, Oak Ridge, TN, USA 37831 6 Dept. of Applied Physics, Columbia University, NYC, NY, USA 10027 7 The Johns Hopkins University, Baltimore MD 21218 Supported by Office of Science Culham Sci Ctr U St. Andrews York U Chubu U Fukui U Hiroshima U Hyogo U Kyoto U Kyushu U Kyushu Tokai U NIFS Niigata U U Tokyo JAERI Hebrew U Ioffe Inst RRC Kurchatov Inst TRINITI KBSI KAIST ENEA, Frascati CEA, Cadarache IPP, Jülich IPP, Garching ASCR, Czech Rep U Quebec College W&M Colorado Sch Mines Columbia U Comp-X General Atomics INEL Johns Hopkins U LANL LLNL Lodestar MIT Nova Photonics New York U Old Dominion U ORNL PPPL PSI Princeton U SNL Think Tank, Inc. UC Davis UC Irvine UCLA UCSD U Colorado U Maryland U Rochester U Washington U Wisconsin
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Confinement and Local Transport in the National Spherical Torus Experiment (NSTX) Stanley M. Kaye 1, M.G. Bell 1, R.E. Bell 1, C. W. Domier 2, W. Horton.
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Confinement and Local Transport in the National Spherical Torus Experiment (NSTX)
Stanley M. Kaye1, M.G. Bell1, R.E. Bell1, C. W. Domier2, W. Horton3, J. Kim3, B.P. LeBlanc1,
F. Levinton4,N.C. Luhmann2, R. Maingi5, E. Mazzucato1, J.E. Menard1, D.R. Mikkelsen1,
H. Park1, G. Rewoldt1, S.A. Sabbagh6, D. Smith1, D. Stutman7, K. Tritz7, W. Wang1, H. Yuh4
21st IAEA/Fusion 2006 MeetingOct 16 – 21, 2006Chengdu, China
1 PPPL, Princeton University, Princeton, NJ, USA 085432 University of California, Davis, CA, USA 95616
3 IFS, University of Texas, Austin, TX, USA 787124 Nova Photonics Inc., Princeton, NJ, USA, 08540
5 ORNL, Oak Ridge, TN, USA 378316 Dept. of Applied Physics, Columbia University, NYC, NY, USA 10027
7 The Johns Hopkins University, Baltimore MD 21218
NSTX Addresses Transport & Turbulence Issues Critical to Both Basic Toroidal Confinement and Future Devices
• NSTX offers a novel view into plasma T&T properties– NSTX operates in a unique part of
dimensionless parameter space: R/a, T, (,
– Dominant electron heating with NBI: relevant to -heating in ITER
Major Radius R0 0.85 mAspect Ratio A 1.3Elongation 2.8Triangularity 0.8Plasma Current Ip 1.5 MAToroidal Field BT 0.55 TPulse Length 1.5 sNB Heating (100 keV) 7 MWT,tot up to 40%
– Excellent laboratory in which to study electron transport: electron transport anomalous, ions close to neoclassical
– Large range of T spanning e-s to e-m turbulence regimes
– Strong rotational shear that can influence transport
– Localized electron-scale turbulence measurable (e ~ 0.1 mm)
SMK – 21st IAEA 3
This Presentation Will Focus on Confinement & Transport Trends in NSTX and Their Underlying Processes
• Major accomplishments– Key confinement and transport dependences established (BT, Ip, , , q(r),
…)
– High priority ITPA tasks have been addressed
• Dimensionless parameter scans in Te
• Established more accurate (=a/R) scaling with NSTX (& MAST) data included in the ITPA database