A new broadband ECRH system is currently under construction at the ASDEX Upgrade tokamak. This system employs multi-frequency gyrotrons step-tunable in the range 105-140 GHz. A set of two corrugated polarizer mirrors are applied to provide for an arbitrary polarization of the Gaussian beam injected into the plasma. The principal bandwidth of such a two-polarizer setup has been evaluated. It can be shown that two mirrors with sinusoidal grooves and corrugation depths adjusted to the center frequency of 122.5 GHz satisfy the requirements.
Polarizer design for multi-frequency high power ECRH transmission lines
2004-01-01
200759 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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