1. Antenna Adjustment SPL Cold Test

2. Measurement Setup Q ext for input and pick-up antenna determined by S 21 using a critical coupled reference antenna on the respectively opposite side of the cavity Reference Antenna (  critical coupled) Pick-Up Antenna S 21 -> Q ext,Pick-Up Measurement setup for Pick-Up antenna Pick-Up Input

3. 1 st Antenna Adjustment 05/2014 Antennas that we let produce 76 mm 72 mm Different Flange Karim, Kai

4. Verification test 02/07/2014 Input antenna Q ext = 1.9E9 Pick-Up antenna: Q ext = 8E8 Discrepancy due to wrong estimated offset and big variety in connectors and flanges: Input Pick-Up Coax Connectors Pick-Up Waqas, Kai

5. 2 nd Antenna Adjustment 2-4/07/2014 With final flanges and coaxial connectors: + + + L = 20 mm Qext = 5.8E9 L = 58 mm Qext = 4E11 L = 72 mm Qext = 5.7E9 Progress … Tobias, Karim, Kai

6. Summary At the moment available copper antennas: – 2x 72 mm -> input antenna – 2x 76 mm Flanges ready for Nb coating at the end of this week Pick-Up with 72 mm copper antenna (combined flange) need to be cut to: 20 mm input antenna (flat flange) 58 mm pick-up antenna Favourites for the cold test Thanks to Elise, Tobias, Karim, Nuria, Waqas, Szabina, …