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Description
Shanghai High Repetition Rate XFEL and Extreme Light Facility (SHINE) is a continuous wave superconducting linear accelerator. It is the largest Chinese investment in scientific infrastructure ever. In order to achieve measurement of the electron beam position with a resolution of over 200 nm in the undulator, a new RF direct sampling electronics for the SHINE cavity BPM system was developed, which directly samples the 5.254 GHz cavity BPM signal at 2.6 GSPS with a processing speed of 1 MHz. Compared to traditional electronics, which rely on complex analog down-conversion before digitization, this system greatly simplifies the front-end by removing the need for down-conversion phases and achieving comparable performance. This is the first time that a batch of RF direct sampling electronics for cavity BPMs on a FEL has been introduced. In this paper, we will present the developed and deployment of the RF direct sampling electronics for SHINE cavity BPM.
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