Peripheral Plasma Turbulence Measurement of Heliotron J plasmas

摘要

Using a fast camera with tangential view motion of the filamentary structures in peripheral regions was observed. It was already confirmed that motion of this turbulence was dithering during "Phase I" in former SMBI (supersonic molecular beam injection) experiment. During "Phase I" Heliotron J plasma did not always reach the H-mode nor radiation collapse even though the electron density was larger than the threshold. Moreover, the electron density may be controllable in "Phase I" plasma. It was favorable for fusion reactor plasma. This time SMBI experiment with careful adjustment of gas puff quantity was demonstrated for realizing "Phase I" and it was successful to obtain higher confinement energy shot. In this paper the fast camera measurement of this experiment is described.