Geodetic Support for LIA-20 Linear Induction Accelerator Assembly and Operation

The article presents methodological and technological solutions for geodetic support of the LIA-20 linear induction accelerator design and assembly. Based on the facility geometry and the accelerator elements positioning tolerances, the arrangement scheme was developed for reference geodetic network signs. To assess the accuracy of the geodetic signs mutual location and the laser tracker positioning in the accelerator hall, the results of mathematical modeling were studied. To coordinate the facility design with the structure of the accelerator, a survey was carried out, so the spatial model of the building was obtained. Here we show the procedures of elements’ axes determination and corresponding local coordinate systems construction for elements of accelerator. The solutions for fixing the coordinate system of the entire accelerator complex are given. The processes of equipment installation and setting into the design position are reported. The data showing the dynamics of the reference geodetic network signs relative displacement over 6 measurement cycles (2018 - 2024 period) are presented.

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