The 26th ESL RF Meeting held at Elettra in Trieste discussed the status and upgrades of the ESRF-EBS 352 MHz RF system. The meeting covered topics such as the EBS RF layout, HOM damped cavities, RF ECO-Mode, ongoing RF projects, and the replacement of klystrons with SSAs for a 4th harmonic RF system

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Research highlights the first operation of a klystron equipped with a superconducting MgB2 solenoid, aiming to enhance efficiency and sustainability of klystron systems. The focus is on integrating novel solenoid designs, such as those proposed by A. Yamamoto, to optimize klystron performance at CER

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Recent developments in klystron efficiency and technology at CERN are focused on increasing electronic efficiency, improving power consumption, and exploring new bunching technologies. Efforts include designing high-efficiency tubes for CLIC, retrofitting existing klystrons for improved performance,

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Explore novel RF source topologies and advanced modeling techniques to achieve higher efficiency and power density in RF systems. Discover tradeoffs, multi-beam arrays, radial beam klystrons, and deflected beam amplifiers for improved performance in high-power applications.

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Plenary discussion at the ARIES Workshop on Energy Efficient RF at Uppsala University delved into the future of vacuum tubes, including tetrodes, IOTs, klystrons, and modulators. Key topics discussed were the reliability of vacuum tubes, potential for solid-state power amplifiers to replace them, ch

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Recent work at CLIC includes optimizing the positron source, developing the drive beam injector front end, and exploring new baselines. A new student has joined to work on the positron source simulations. Preliminary studies show promising results in increasing the solenoid field for the positron so

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