Home / Store / Journals / Electronic Articles / Fusion Science and Technology / Volume 63 / Number 1T
Kiyoyuki Yambe, Michiaki Inomoto, Shigefumi Okada
Fusion Science and Technology
Volume 63 / Number 1T / May 2013 / Pages 147-151
Format:electronic copy (download)
We have measured detailed axial profiles of electron density, floating potential, and axial magnetic field in the field-reversed configuration (FRC) sustained by the rotating magnetic field. To study the influence on the equilibrium of two kinds of bias magnetic field configuration - straight (pure solenoidal) and mirror -, experiments have been carried out in the FRC Injection Experiment apparatus. The case of mirror configuration has longer quasi-steady state compared with the case of straight configuration. The steeper density gradient outside the separatrix is generated by the uniform gradient of magnetic field due to the mirror configuration. The axial parallel diffusion is suppressed due to the steeper density gradient outside the separatrix. Therefore, the mirror bias magnetic field configuration works to improve the plasma confinement.
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