Characterization of NSLS accelerating cavities using impedance measurement techniques

S.M. Hanna, P.M. Stefan
Proceedings of International Conference on Particle Accelerators  
Impedance measurements, using a central wire to simulate the electron beam, were performed on a 52 MHz accelerating cavity a? the National Synchrotron Light Source (NSLS). To damp higher-order modes (HOM) in this cavity, damping antennas have been installed. We implemented the impedance measurement technique to characterize the cavity modes up to 1 GHz and confirm the effectiveness of the damping antennas. Scattering parameters were measured using a network analyzer (HP 8510B) and values for R
more » ... nd Q were extracted using a new analytical technique. Our results showed good agreement with URMEL simulations and with other independent Q measurements. This technique offers a more time-effective technique for obtaining R/Q, compared with the bead-pull method.
doi:10.1109/pac.1993.308738 fatcat:b45d4wb7b5dhvacylu7ewbc54u