during standard operation. The current status of the RF systems is available on our online monitoring page . Development Projects Cavity systems for the SIS100 (Acceleration, Bunch Compression, K.O.- [...] projects. Some of these projects are listed in the following. Operation of Ring-RF-Systems The operation of the RF systems requires continuous maintenance work, repair in case of failures, and stand-by service [...] Extraction, Barrier Bucket, and Longitudinal Feedback) Cavity systems for the CR Digital RF Control Bunch Phase Timing System BuTiS Fast semiconductor gap switches to temporarily short-circuit the ceramic