Measurement Setup Q ext for input and pickup antenna determined by S 21 using a critical coupled reference antenna on the respectively opposite side of the cavity Reference Antenna ID: 928157
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Slide1
Antenna Adjustment
SPL Cold Test
Slide2Measurement Setup
Q
ext
for input and pick-up antenna determined by S21 using a critical coupled reference antenna on the respectively opposite side of the cavity
Reference Antenna
(
critical coupled)
Pick-Up Antenna
S21 -> Qext,Pick-Up
Measurement setup for Pick-Up
antenna
Pick-Up
Input
Slide31
st
Antenna Adjustment 05/2014
Antennas
that we let produce
76 mm
72 mm
Different Flange
Karim, Kai
Slide4Verification test 02/07/2014
Input antenna
Q
ext = 1.9E9Pick-Up antenna:
Q
ext = 8E8Discrepancy due to wrong estimated offset and big variety in connectors and flanges:
Input
Input
Input
Pick-Up
Coax Connectors
Pick-Up
Waqas
, Kai
Slide52
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 mmQext = 5.7E9
Progress …
Progress …
Tobias, Karim, Kai
Slide6Summary
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 antennaFavourites for the cold testThanks to Elise, Tobias, Karim, Nuria, Waqas, Szabina, …