Development of a quasi-periodic undulator for the HLS

YANG Yu-Feng; LU Hui-Hua; CHEN Wan; JIA Qi-Ka; SUN Shu-Chen; LI Zhi-Qiang

doi:10.1088/1674-1137/38/7/077002

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2024年10月30日

Chinese Physics C> 2014, Vol. 38> Issue(7) : 077002 DOI: 10.1088/1674-1137/38/7/077002

Development of a quasi-periodic undulator for the HLS

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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 3^rd 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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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

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Received: 2013-08-13
Revised: 2014-03-10

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沈阳化工大学材料科学与工程学院沈阳 110142

Development of a quasi-periodic undulator for the HLS

Corresponding author: LU Hui-Hua,

Received Date: 2013-08-13
Accepted Date: 2014-03-10
Available Online: 2014-07-05

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 3^rd 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.