The W7-AS data acquisition and automatic antenna matching system
Present ICRH antennae consist of a poloidal current strap fed from a coaxial feed line. The radiation resistance of this strap to the plasma is typically very low, leading to a high VSWR in the transmission lines feeding the antenna. Since the high power RF generators supplying the power can only operate into low VSWR lines, some form of matching is required. This is usually achieved by a double stub tuner. An automatic system for measuring the complex antenna impedance and calculating the optimal tuning stub positions for the ICRH antennae on W7-AS is presented.
Bibliographic Reference: Report: IPP 4/264 EN (1993)
Availability: Available from Max-Planck-Institut für Plasmaphysik, 8046 Garching bei München (DE)
Record Number: 199410053 / Last updated on: 1994-11-28
Original language: en
Available languages: en