Speaker
Dr
Nikolai Schwerg
(CERN)
Description
The low-level RF system for LHC and Linac4 relies on the accurate readings of waveguide directional couplers as well as the cavity antenna measurements. A good calibration of both is crucial for an effective regulation.
We briefly revise the working principle of waveguide directional couplers and illustrate the coupler calibration process. Inevitable standing waves in the calibration setup limit the accuracy for the directivity. We will discuss this effect and a technique to compensate this imperfection of the directional coupler mathematically in the low level RF system.
Author
Dr
Nikolai Schwerg
(CERN)
