Advanced experiments on Field-Reversed Configuration at Osaka

Confinement, heating and compression experiments of Field-Reversed Configuration (FRC) plasma have been conducted in an FRC experimental machine at Osaka. The FRC formed in a quartz tube with a high voltage θ-pinch system is translated into a confinement region with quasi-steady magnetic field, and expands by a factor of 100. Separation of the confinement region from the formation part makes it convenient to mount some additional components. In order to investigate the power input by the application of a fast-rise magnetic pulse, magnetic fluctuation is measured. High power neutral beam injectors have been installed for heating. An axial magnetic compression experiment has been also done, looking for a new compression scheme that has a possibility to heat the plasma and to improve confinement properties.