RAY-TRACING IN AN ELECTRON-CYCLOTRON-RESONANCE PLASMA

We present studies of the propagation and absorption of the 2.45 GHz r ight-hand circularly polarized TE(11) mode using the ray-tracing metho d in an electron cyclotron resonance device. The magnetic-field config uration is the typical one operating at KAIST, and two different basic radial density profiles are considered, a constant and the Bessel fun ction J(0)-like cases. For a J(0)-like radial density profile, we find that the ray-path behaviors near the edge regions are different from the those previously reported. The ray-paths turn around rather than l eave the system. The power-deposition results for the J(0)-like case a re broader and less peaked than those for the constant case, and the d istance between the regions of power deposition and the ECR resonance is larger for the higher average density. That is, the power is mostly absorbed before reaching the ECR layer and the higher the density is, the earlier most of the power is absorbed before the wave reaches the ECR layer.