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TY - CONF AU - Chen, J. AU - Leng, Y.B. AU - Yu, L.Y. AU - Zhang, N. ED - Schaa, Volker RW TI - The Removal of Interference Noise of ICT using the PCA Method J2 - Proc. of IBIC2018, Shanghai, China, 09-13 September 2018 CY - Shanghai, China T2 - International Beam Instrumentation Conference T3 - 7 LA - english AB - The measurement of beam charge is a fundamental re-quirement to all particle accelerators facility. Shanghai soft X-ray free-electron laser (SXFEL) started construc-tion in 2015 and is now in the commission phase. Al-though integrated current transformer (ICT) were installed in the entire FEL for the measurement of the absolute beam charge, the accurate measurement becomes difficult in the injector and the main accelerator section due to the noise interference from external factors such as klystron modulator. The evaluation of the source of noise signals and the procession of noise reduction using the principal component analysis (PCA) are proposed in this paper. Experiment results show that PCA method can effectively remove the interference of lower frequency noise from the klystron modulator and it can also improve the resolution of the ICT system. Detailed experiment results and data analysis will be mentioned as well. PB - JACoW Publishing CP - Geneva, Switzerland SP - 22 EP - 25 KW - FEL KW - SRF KW - experiment KW - electron KW - Windows DA - 2019/01 PY - 2019 SN - 978-3-95450-201-1 DO - DOI: 10.18429/JACoW-IBIC2018-MOOC03 UR - http://jacow.org/ibic2018/papers/mooc03.pdf ER -