JACoW is a publisher in Geneva, Switzerland that publishes the proceedings of accelerator conferences held around the world by an international collaboration of editors.
TY - UNPB AU - Lau, M. ED - Braun, Hans-Heinrich ED - Chrin, Jan ED - Ganter, Romain ED - Hiller, Nicole ED - Schaa, Volker RW TI - Highly Reliable RF Power Sources for Improvement of the Accelerator Availability J2 - Proc. of FLS2023, Luzern, Switzerland, 27 August-01 September 2023 CY - Luzern, Switzerland T2 - ICFA Advanced Beam Dynamics Workshop T3 - 67 LA - english AB - The trend in exchanging established tube technolo-gy by solid-state based RF power amplifier for particle accelerators around the world is ongoing. Since the first installations* of such amplifier systems several concepts were developed and installed**. As the RF sources are key for the accelerator availability their reliability plays a crucial role. This needs to be considered during the design phase of the overall amplifier system architecture in a new way compared to the tube technology. For tubes it is straight forward as usually one tube powers one or more cavities due to the high power provided. But this also bears the risk of a single point of failure despite the need of high voltage power supplies, continuous degradation and their availability, just to mention the most important aspects. For solid-state power amplifier many transistor units need to be combined for delivering the needed RF power to each cavity. The combining concepts and the overall system architecture finally determine the possibility of de-rating options and redundancy of transistors for compensation of failed units within the system, and thus the overall availability. Our concept for com-bining several transistors in amplifier units*** and assembling these units into racks recently has proven an outstanding performance. For 8,419 hours of opera-tional time, we had a total of 13.9 hours for not being available due to incidents. This results in a total system availability of ~99.83% for more than 980 operational amplifier units at customer site. Here, we want to demonstrate our system architec-ture and the design aspects we considered for reaching this high performance. We think that this is a crucial contribution for bringing this technology one step further to maturity. PB - JACoW Publishing CP - Geneva, Switzerland ER -