Porous plug gas injection systems for studies of hydrocarbon dissociation and transport in the DIII-D tokamak.

Software Development on the Diii–d Control and Data Acquisition Computers

The various software systems developed for the DIII–D tokamak have played a highly visible and important role in tokamak operations and fusion research. Because of the heavy reliance on in-house developed software encompassing all aspects of operating the tokamak, much attention has been given to the careful design, development and maintenance of these software systems. Software systems respons...

Recent Experimental Studies of Edge and Internal Transport Barriers in the Diii–d Tokamak

Anomalous transport scaling in the DIII-D tokamak matched by supercomputer simulation.

Gyrokinetic simulation of tokamak transport has evolved sufficiently to allow direct comparison of numerical results with experimental data. It is to be emphasized that only with the simultaneous inclusion of many distinct and complex effects can this comparison realistically be made. Until now, numerical studies of tokamak microturbulence have been restricted to either (a) flux tubes or (b) el...

Erosion/redeposition analysis: status of modeling and code validation for semi-detached tokamak edge plasmas

We are analyzing erosion and tritium codeposition for ITER, DIII-D, and other devices with a focus on carbon divertor and metallic wall sputtering, for detached and semi-detached edge plasmas. Carbon chemical-sputtering/hydrocarbon-transport is computed in detail using upgraded models for sputtering yields, species, and atomic and molecular processes. For the DIII-D analysis this includes proto...

A 3D elasto-plastic FEM program developed for reservoir Geomechanics simulations: Introduction and case studies

The development of yielded or failure zone due to an engineering construction is a subject of study in different disciplines. In Petroleum engineering, depletion from and injection of gas into a porous rock can cause development of a yield zone around the reservoir. Studying this phenomenon requires elasto-plastic analysis of geomaterial, in this case the porous rocks. In this study, which is a...