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NSTX Team Meeting - Physics Analysis September 25, 2003

NSTX Team Meeting - Physics Analysis September 25, 2003. C.K. Phillips and S. Kaye. Transport Studies. GTC-Neo Code/ W. Wang detailed particle orbits have been included in this global d f particle-in-cell gyro-kinetic code

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NSTX Team Meeting - Physics Analysis September 25, 2003

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  1. NSTX Team Meeting - Physics AnalysisSeptember 25, 2003 C.K. Phillips and S. Kaye

  2. Transport Studies • GTC-Neo Code/ W. Wang • detailed particle orbits have been included in this global df particle-in-cell gyro-kinetic code • can now be used to calculate neoclassical transport, bootstrap currents and Eradial in NSTX plasmas. • Comparisons against more approximate models (e.g., NCLASS, etc) will be made. • Initial studies reported this morning by W. Wang at PPPPL Theory Seminar • Error analysis technique for thermal conductivities / B. LeBlanc • A method to determine the error bars on thermal conductivities for a given NSTX discharge from a single TRANSP run is being developed. • The method uses TRANSP to determine the volume-integrated conducted power and a detailed stand-alone data analysis tool to determine the error bars on the density and plasma temperatures and their gradients. • Some final improvements related to the treatment of the density and temperature gradients are currently being implemented.

  3. HHFW Heating and CD Modeling • TRANSP & CURRAY Package / (K. Indireshkumar, T.K. Mau and B. LeBlanc): • integrated package is now available in the TRANSP “pshare” area • HHFW power deposition profiles look reasonable at all time steps in a TRANSP analysis of an NSTX HHFW discharge • HHFW CD profiles are currently being integrated into the poloidal field diffusion solver in TRANSP • AORSA-2D code (E.F. Jaeger / ORNL , C.K. Phillips, R. Dumont / CEA and J. Spaleta / P.U.) • Code has been generalized to include fully non-Maxwellian species in the wave field calculations • Capability to run the code from PPPL is being implemented (requires rebuilding the PLPLOT graphics package on the PPPL cluster) • Work currently supported by RF SciDAC project

  4. Equilibrium Studies • FLOW code - L. Guazzotto, J. Manickam, S. Kaye • Code now runs reliably with equilibrium profiles imported from TRANSP • Analysis of NSTX discharges is now underway • Simulations of profile asymmetries in the density and temperature will be compared against experimental data

  5. NSTX Equilibrium Reconstruction Upgrades • NSTX EFIT and PHOENIX upgrades (S. Sabbagh): • Improvements include: • toroidal rotation, flux iso-surface, and pitch angle constraints • using CHERS Ti, dynamic pressure, Thomson iso-Te surfaces • rotation and iso-Te surfaces yield a self-consistent solution • use of iso-Te surfaces should reduce q profile error • CHERS Ti reduces error bar on pressure profile input • pitch angle input in preparation for MSE data • Pitch angle computations presently read from EFIT01, or 02 • Optionally include TRANSP pressure profile • Double the # of measured constraints relative to existing analysis • PHOENIX upgraded to provide this analysis between-shots • Status: • New NSTX EFIT executable built • PHOENIX upgrades now writing input data files – initial runs to occur this week

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