(cont.) Clear evidence of current drive was seen as the loop voltage decreased by about 50%. Studies were performed by varying the phase, density, and magnetic field as well as changing the direction that the waves were launched. Analysis using CQL3D indicates that a current drive efficiency of 0.15 (1020 m-2A/W) was obtained by driving 167 kA of LH current with 410 kW at a line-average density of 5.5 x 1019 m-3, without an electric field. This efficiency exceeds what was observed on Alcator C, but is within the! range observed on FTU for similar densities. Including the residual electric field increased the LH driven current to 308 kA, corresponding to an increased effective efficiency of 0.28. In addition to experiments, extensive modeling of current profile control through phase variation was studied, including compound spectra, using CQL3D. It was found that over 200 kA of off-axis LH current can be generated in a variety of profile shapes in an H-mode target plasma. Finally, time dependent modeling of an integrated scenario was performed using the transport code TRANSP to explore what performance can be ultimately achieved on C-Mod. Results indicate that fully non-inductive, quasi-steady-state plasmas are possible with bootstrap fractions as high as 75%.

Magnetic Fusion Technology describes the technologies that are required for successful development of nuclear fusion power plants using strong magnetic fields. These technologies include: • magnet systems, • plasma heating systems, • control systems, • energy conversion systems, • advanced materials development, • vacuum systems, • cryogenic systems, • plasma diagnostics, • safety systems, and • power plant design studies. Magnetic Fusion Technology will be useful to students and to specialists working in energy research.