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TY - UNPB AU - Wei, W. AU - Gu, K. ED - Cheng, Yung-Sen ED - Schaa, Volker RW ED - Chiu, Pei-Chen ED - Li, Lu ED - Liu, Yung-Hui ED - Petit-Jean-Genaz, Christine TI - Development of Differential Currents Measurement System for MPS J2 - Proc. of PCaPAC2018, Hsinchu, Taiwan, 16-19 October 2018 CY - Hsinchu, Taiwan T2 - International Workshop on Emerging Technologies and Scientific Facilities Controls T3 - 12 LA - english AB - To ensure safe and stable operation under high power beams, the accelerator device needs a fast, safe and reliable Machine Protection System (MPS). The MPS system uses the detector signals and sampled signals related to the beam quality to reflect the beam and machine status in real time, as well as to carry out chain protection to avoid critical equipment damage by the high power beams. This article mainly describes a differential currents measurement system, which monitors the beam current changes along the beam pipe and utilizes this distinct signal as a fast interlock protection output. The system obtains the signals of the beam current detectors online. By performing a fast average difference compensation calculation in FPGA, it can give a real-time stream strength and transmission efficiency of the beam. Then after setting a reasonable threshold, the system can give the fast interlock protection signal by evaluating the beam loss situation and provide an alternative solution of the low-energy beam loss issue in high-power accelerators. PB - JACoW Publishing CP - Geneva, Switzerland ER -