The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
TY - CONF AU - Yan, L.G. AU - Deng, D.R. AU - Li, M. AU - Li, P. AU - Wang, J. AU - Yang, X. AU - Zhang, H. ED - Schaa, Volker RW ED - Ji, Daheng ED - Li, Lu ED - Zhao, Ning TI - Magnetic Measurement of the Undulator U38 for THz-FEL J2 - Proc. of SAP2017, Jishou, China, 28-30 August 2017 C1 - Jishou, China T2 - Symposium on Accelerator Physics T3 - 13 LA - english AB - The high average power terahertz free electronic laser facility (THz-FEL) has one undulator named U38. As one of the most important components, U38 has a significant effect on entire facility. So, we measure the magnetic field of U38 to confirm its field qualities using magnetic field measurement bench before installation. The measurement gaps include 19 mm, 21 mm, 24 mm, 25.6 mm and 28 mm, and the longitudinal distribution of magnetic field on five lines at transverse positions of -6 mm, -3 mm, 0 mm, 3 mm and 6 mm are scanned. Electronic trajectory, peak field vs gap curve and peak-to-peak error are calculated based on the longitudinal distribution of magnetic field. We also measure the transverse distribution of magnetic field to test the good field region. In this proceeding, the measurement method is described and the results are presented and discussed. PB - JACoW CP - Geneva, Switzerland SP - 156 EP - 158 KW - ion KW - electron KW - undulator KW - FEL KW - laser DA - 2018/02 PY - 2018 SN - 978-3-95450-199-1 DO - 10.18429/JACoW-SAP2017-TUPH21 UR - http://jacow.org/sap2017/papers/tuph21.pdf ER -