Development of a quasi-periodic undulator for the HLS

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YANG Yu-Feng, LU Hui-Hua, CHEN Wan, JIA Qi-Ka, SUN Shu-Chen and LI Zhi-Qiang. Development of a quasi-periodic undulator for the HLS[J]. Chinese Physics C, 2014, 38(7): 077002. doi: 10.1088/1674-1137/38/7/077002
YANG Yu-Feng, LU Hui-Hua, CHEN Wan, JIA Qi-Ka, SUN Shu-Chen and LI Zhi-Qiang. Development of a quasi-periodic undulator for the HLS[J]. Chinese Physics C, 2014, 38(7): 077002.  doi: 10.1088/1674-1137/38/7/077002 shu
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Received: 2013-08-13
Revised: 2014-03-10
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Development of a quasi-periodic undulator for the HLS

    Corresponding author: LU Hui-Hua,

Abstract: China's first quasi-periodic undulator (QPU) has been developed for the Hefei Light Source (HLS). It uses a magnetic configuration with varied thicknesses of NdFeB blocks, which is based on the QPU of European Synchrotron Radiation Facility (ESRF). The depression of 3rd harmonic radiation is significantly improved over the ESRF QPU, as deduced from the measured magnetic fields. A method of configuring shims of different geometries and sizes, based on a symmetric principle to correct multi-pole field integrals, is demonstrated.

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