Speaker
Description
High-efficiency klystrons can significantly reduce the operational costs of particle accelerators. However, for the of low-duty-factor klystrons commonly used in linear accelerators, the power consumption of electromagnetic focusing coils remains non-negligible. This paper presents the progress of an S-band 50 MW high-efficiency klystron employing periodic permanent magnet (PPM) focusing aiming to achieve high conversion efficiency while minimizing auxiliary power consumption. Due to the relatively large dimensions of S-band tubes, the focusing structure is constrained and the beam rigidity is limited. These factors impose stringent requirements on beam dynamics design and require coordinated optimization of the magnetic field configuration and electron bunching process.. Simulation results validate the feasibility of applying PPM focusing to a high-efficiency S-band klystron, with an overall tube efficiency of 54%.The proposed S-band PPM klystron provides a promising approach for improving the efficiency and reducing the operational cost of high-power RF sources in accelerator application.
Funding Agency
Yifang Wang’s Science Studio of the Thousand Talents Project and National Key Programme for ST Research and Development (Grant NO.: 2024YFA1610602)
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