Modeling of far SOL plasma transport in NSTX
For better understanding and characterization of non-diffusive transport occurring in the NSTX tokamak edge plasma, we performed extensive simulations of NSTX edge plasmas with the multi-fluid two-dimensional UEDGE code by using realistic model for impurity sputtering sources and hybrid model for anomalous cross-field transport. Our cross-field transport model incorporates the effects of non-diffusive intermittent transport by introducing anomalous convective velocities whose spatial profile is adjusted for each ion charge state to match available experimental data. The research in 2002-2005 financial years was focused on the following areas: (i) development of capabilities for UEDGE simulation of NSTX spectroscopy data (i.e., the 3D real-geometry postprocessor UEDGE tools for comparison between UEDGE and experimental data), (ii) simulation of multi-diagnostic data from NSTX with UEDGE, (iii) study of anomalous cross-field convective transport of impurity ions, (iv) analysis of divertor plasma opacity to resonance radiation, and (v) study the effects of ballooning-like anomalous cross-field transport and spherical-torus magnetic configuration on parallel plasma flows in the SOL.
- Research Organization:
- Univ. of California, San Diego, CA (United States); La Jolla, CA
- Sponsoring Organization:
- USDOE; USDOE SC Office of Fusion Energy Sciences (SC-24)
- DOE Contract Number:
- FG02-02ER54680
- OSTI ID:
- 1068679
- Report Number(s):
- DOE/ER54680-1 Final Report
- Country of Publication:
- United States
- Language:
- English
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