Speaker
Sergey Kuzikov
(Thomas Jefferson National Accelerator Facility)
Description
We describe a method for measuring the loaded and intrinsic quality factors, the external quality factor, and cavity detuning using algorithms based on solutions of the cavity differential equations in the I/Q domain. We report measurement results for Nb₃Sn cavities at Jefferson Lab’s UITF facility. The measurements include several tens of forward, probe, and reflected signal traces, each several minutes long, recorded at various accelerating gradients and with different klystron amplitude modulation profiles. We evaluated several noise-reduction and Q-factor fitting methods, achieving good accuracy for loaded and external Q values and satisfactory accuracy for Q₀.
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Author
Sergey Kuzikov
(Thomas Jefferson National Accelerator Facility)
Co-authors
Haipeng Wang
(Thomas Jefferson National Accelerator Facility)
Peter Owen
(Thomas Jefferson National Accelerator Facility)
Volker Ziemann
(Thomas Jefferson National Accelerator Facility)