Magnetic and Mechanical Center Deviations of NSLS-II Magnets

Yu, Chenghao; Karl, F.; Seiler, S. W.; Ilardo, Matthew; Ke, Ming-Da; Spataro, C.; Sharma, S.

doi:10.2172/1505112

Cited by 1 publication

(1 citation statement)

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“…The design and manufacture of large scientific devices reflect the highest level of engineering science in the era in which they are built and serve as a monumental force driving the development of precision engineering measurement technology [1]. The fourth generation of synchrotron radiation particle accelerators, such as MAX-IV [2], ESRF [3], APS [4], NSRS-II [5], SPRING-8 [6], Sirius [7], HEPS [8] and HALF [9], have been established all over the world. This deformation causes the beam's motion trajectory to gradually deviate from its designed ideal closed orbit, ultimately affecting the quality of various experiments by feeding back to the actual beam position.…”

Section: Introductionmentioning

confidence: 99%

Research on fusion and deformation analysis of decade' HLS-II control network surveying data

Wu,

Wang,

et al. 2024

J. Inst.

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To ensure the long-term stability of the beam and further construction needs, it is necessary to re-measure the particle accelerator regularly. Since 2013, we have been measuring the HLS-II control network with laser trackers and the level for 10 years. Taking HLS-II as the object of study, we introduced the data acquisition strategy for the period of 2013–2023. We analyzed the horizontal and vertical deformation trends of each control point. In the vertical direction, we fused the geometric level and elevation data of the laser tracker network by using MC-GMM (a Gauss-Markov model which considers the uncertainty of Monte Carlo simulation). The analysis results show that, after the HLS upgrade, the annual average settlement of the ground control network tends to be stable. The settlement and horizontal variation of the device are all within a reasonable and controllable range. To ensure stability, accuracy, and efficiency in the measurement, we recommend employing the laser tracker for the re-measurement of the HLS-II storage ring. The data processing flow and methods mentioned in the article can provide a reference for deformation analysis of the upcoming construction of the Hefei Advanced Light Facility (HALF) and other large-scale metrology projects.

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