NSTX Team Meeting - Physics Analysis September 25, 2003 C.K. Phillips and S. Kaye.

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Presentation transcript:

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  f particle-in-cell gyro-kinetic code –can now be used to calculate neoclassical transport, bootstrap currents and E radial 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.

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

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

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