Research on the layout of primary control network and new measurement method for the HIAF survey and alignment

Yang, Yaqing; Zhang, Xiaodong; Zheng, Yi; Zhang, Bing; Yang, Da‐Jie; Zhang, Xudong; Wang, Shaoming; Yuan, Jiandong; Sun, Guangyong

doi:10.1016/j.nima.2022.167507

Cited by 1 publication

(1 citation statement)

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“…Their methods have been successfully applied to the on-site alignment of a 23 m × 16 m compact range alignment with 0.054 mm 's RMS accuracy based on a laser tracker [23]. Chen et al employed a dual-cylinder structure in the main control network of HIAF, which enhanced stability [24]. By introducing the position into the tunnel through the point positioning method using laser tracker, the positional stability of the accelerator was improved, thereby enhancing measurement accuracy and efficiency.…”

Section: Introductionmentioning

confidence: 99%

High-precision and high-efficiency measurement method of accelerator tunnel control network based on total station angle observation

Xing,

Dong,

Wang

et al. 2023

Meas. Sci. Technol.

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Given the importance of accelerator devices, major developed and emerging countries around the world have invested substantial human and material resources into the development, construction, and operation of more advanced large-scale accelerator devices. High-precision and high-efficiency alignment of the control network is crucial for the stable operation of accelerators. This study proposes a method for measuring tunnel control networks using total station angle observation. By taking advantage of the high precision of angle observation with a total station, we use the measured results of the designed and deployed control points measured by the laser tracker to simulate the total station angle observations, combined with some length scale values in the control network measured by the laser range finder. With the angle observations and several known distances, the point coordinates can be calculated by angle intersection methods. Only angle observations are used from total stations, while different length scale reference conditions are added to constrain the control network. This is done by calculating the point accuracy of the China Spallation Neutron Source circular accelerator. The overall plane point accuracy can reach 66 μm. By using this method, personnel will spend less time on the site and are at lower risk of radiation exposure, for example by automating measurements at night. This method can be used at nighttime for measurements, avoiding the need for daytime work and shielding employees from severe radiation exposure. By employing this method, efficiency can be increased twice. For on-site measurement, it enables monitoring and automated measurement during operation, as well as providing reference for the installation and measurement of tunnel control networks for large scale accelerators such as the Circular Electron Positron Collider.

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Section: Introductionmentioning

confidence: 99%