The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
TY - CONF AU - Chen, F.Z. AU - Chen, J. AU - Lai, L.W. AU - Leng, Y.B. AU - Wu, T. AU - Yu, L.Y. AU - Yuan, R.X. ED - Schaa, Volker RW TI - On-line Crosstalk Measurement and Compensation Algorithm Study of SXFEL Digital BPM System J2 - Proc. of IBIC2018, Shanghai, China, 09-13 September 2018 CY - Shanghai, China T2 - International Beam Instrumentation Conference T3 - 7 LA - english AB - Shanghai soft X-ray Free Electron Laser (SXFEL) has acquired the custom designed Digital BPM processor used for signal processing of cavity BPMs and stripline BPMs. In order to realize monitor the beam position accurately, it has high demand for DBPM system performance. Considering the crosstalk may introduce distortion and influence beam position resolution, it is important to analyze and compensate the crosstalk to improve the resolution. We choose the CBPM signal to study the crosstalk for its narrowband and sensitive for phase. The main experiment concept is successive accessing four channels to form a signal transfer matrix, which including amplitude frequency response and phase response information. And the compensation algorithm is acquire four channel readouts, then using the signal transfer matrix to reverse the true signal to ensure the accurate beam position measurement. This concept has already been tested at SXFEL and hopeful to compensate the crosstalk sufficiently. PB - JACoW Publishing CP - Geneva, Switzerland SP - 150 EP - 153 KW - FEL KW - cavity KW - experiment KW - undulator KW - background DA - 2019/01 PY - 2019 SN - 978-3-95450-201-1 DO - DOI: 10.18429/JACoW-IBIC2018-MOPC17 UR - http://jacow.org/ibic2018/papers/mopc17.pdf ER -