DIII-D EDGE PHYSICS DATA-BASE

We have developed an edge physics data base containing data for the plasma in the divertor region and the scrape-off layer (SOL) for the DIII-D tokamak. The data base provides many of the parameters necessary to model the power flow to the divertor and other plasma processes in the plasma edge. It will also facilitate the analysis of DIII-D data for comparison with other divertor tokamaks. In addition to the core plasma parameters, edge-specific data are included in this data base. Initial results using the data base show good agreement between the pressure profiles measured by the Langmuir probes and those determined from the Thomson data for the inner strike point, but not for the outer strike point region. We also find that the ratio of separatrix density to average core density, as well as the in/out asymmetry in the SOL power at the divertor in DIII-D do not agree with values currently assumed in modeling the international thermonuclear experimental reactor (ITER).