Coupling and loading measurements for a dielectric-filled ICRF waveguide coupler

Experiments were carried out to verify models of the reflection coefficients and the phase transitions for matched or loaded dielectric-filled waveguide couplers in the ion cyclotron range of frequencies (ICRF). A model for the plasma load simulation in the waveguide is developed and examined experimentally using the time-domain features of an HP 8510 network analyzer. The loss properties of deionized water, which was used for laboratory waveguide dielectric tests, are also discussed. Close agreement between the coupling models and measurements is obtained, indicating its attractiveness for ICRF coupling