Paper | Title | Page |
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TUPH21 | Magnetic Measurement of the Undulator U38 for THz-FEL | 156 |
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Funding: The work was supported by Ministry of Science and Technology under the project of the national large-scale instrument development (No. 2011YQ130018) and China NSAF Fund under grant of 11505174. 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. |
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DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-SAP2017-TUPH21 | |
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