Double Rectangular X-Band Resonator

The ER 4105DR is a double rectangular cavity operating in the TE₁₀₄ mode with a nominal center frequency of 9.7 GHz and an unloaded Q of 7000. Both chambers are equipped with rapid scan coils. The front chamber has an optical grid with 50% transmission.
 
Determination of spin concentration and g-factor values against a reference sample. The two coupled cavities assure that both samples are measured under identical conditions, i.e. unchanged Q factor.