Control survey and analysis for the KEK e−/e+ injector linac

Okayasu, Y; Suwada, T.; Kakihara, K.; Tanaka, Madoka

doi:10.1063/5.0155651

Cited by 3 publications

(2 citation statements)

References 5 publications

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“…Paper [11,12] provides comprehensive descriptions. Paper [13,14] make developed a control survey technique using a laser tracker and digital level in the KEK 𝑒 − /𝑒 + injector linac and ATLAS experimental cavern. Some researchers have analyzed the accuracy of elevation measurements using different instruments, mainly for single-station height difference comparison [15,16].…”

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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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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“…The applicability and scope of use of laser trackers in particle accelerator alignment and other areas of Large-scale Dimensional Metrology have been significantly improved thanks to the advances in optical technology and the fast data interpretation capability. Currently, most of the accelerator alignment measurements are based on laser trackers, such as in SPring-8 [1], HLS-II [2], SIURIUS [3], ATLAS [4], KEK 𝑒 − /𝑒 + injector linac [5], and so on. The installation process of the important components of the particle accelerator requires that the coordinates of the alignment markers on the magnets or magnet units calibrated during the offline phase be transferred to a global coordinate system.…”

Section: Introductionmentioning

confidence: 99%

Research on datumn transformation model in particle accelerator component installation

Zhang,

Wu,

Wang

et al. 2024

J. Inst.

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When the important components of the particle accelerator are installed, it is required to locate the instrument in the global coordinate system by measuring the control points of the surrounding tunnels, which involves the datumn transformation between the global coordinate system and the station coordinate system, and the selection of the transformation model has gradually become a potential breakthrough in solving the problem. Four different models euler angle, Rodrigues matrix, dual quaternion and twelve parameters are used to analyze and compare the solution parameters, accuracy index, iteration efficiency, and the number of selected common points of the four models with the measured data of 2022 Hefei Light Source summer. The results show that the deviation of the four model parameters from the SpatialAnalyzer commercial software is no more than 3 μm for the translation parameters, and no more than 0.6” for the rotation angle. Among them, the twelve-parameters and dual quaternion two models are theoretically rigorous, with high and stable accuracy indexes, and the twelve parameters posteriori unit weight mean error shows obvious advantages. The twelve parameters and Rodrigues models have fewer iterations and higher efficiency. In summary, the dual quaternion model and twelve parameters method are preferred in the absence of better initial values. In addition, in the process of datumn transformation, along with the increase of the number of common points, the accuracies of all four model solutions show an increasing trend of first fast and then slow.

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Research on particle accelerator control network deformation prediction algorithm with machine learning

Wu,

Lin,

Wang

et al. 2024

Nuclear Instruments and Methods in Physics Research Section A:

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Control survey and analysis for the KEK e−/e+ injector linac

Cited by 3 publications

References 5 publications

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

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

Research on datumn transformation model in particle accelerator component installation

Research on particle accelerator control network deformation prediction algorithm with machine learning

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