A cavity resonator has a so-called quality. In simplified terms, this is a measure of how long an electromagnetic field oscillates in this cavity resonator after a single excitation. Superconducting cavity resonators (cavities) are characterized by very high Q-factors. One way to experimentally determine the Q is to measure the decay time of the excited field.

In this mini-research, the grades of cavities of the S-DALINAC will be measured and discussed. The grades of the cavities installed in the accelerator will be measured periodically so that degradations over time can be studied. Additional cavities can be measured and characterized in a vertical test cryostat.