Reduction of the density profile of a field-reversed configuration plasma from detailed interferometric measurements
Reduction of the density profile of a field-reversed configuration plasma from detailed interferometric measurements
复制标题
通过详细的干涉测量减少场反转配置等离子体的密度分布
DOI：
10.1063/1.343260
复制
发表时间：
1989
影响因子：
3.2
通讯作者：
T. Ishimura
中科院分区：
文献类型：
--
作者：
S. Okada;Y. Kiso;S. Gotô;T. Ishimura
In order to obtain a detailed density profile of a field‐reversed configuration (FRC) plasma, fast‐response multichannel heterodyne quadrature interferometers are constructed. Using these interferometers and assuming a rigid‐body radial shift motion of the plasma, a spatially fine‐grained line integrated density (∫ n dl) profile at its axial midplane is measured. A radial density profile n(r) is reduced from spline fitting of ∫ n dl. The n(r) is found to be nearly an even function of u(=r2/R2−1, R is the magnetic axis radius) as expected. The n(r) is also obtained by the fitting of a line integral of a model n(r) consisting of a modified rigid rotor (RR) profile which can describe the density steepening near the separatrix of the FRC plasma. When the plasma is fat (xs =separatrix radius/coil inner radius=0.63), the density profile is very near to the RR profile itself given by sech2 (Ku), where K is a constant. When the plasma is slender (xs =0.43), the modification is somewhat pronounced. In both cases n...
