Control survey and analysis for the KEK e-/e+ injector linac
Y Okayasu1, T Suwada1, K Kakihara1
1High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan.
Abstract:
A control survey technique using a laser tracker and a digital level was introduced to the KEK e-/e+ injector linac in 2020. Control surveys are continuously demonstrated during the machine's downtimes every summer. Analysis of the two-year data reproduces their trends in terms of the fiducial points on the beam line. In our paper, we report on systematic coordinates and their error distributions evaluated by a control survey, compare them with a numerical survey simulation, and discuss newly encountered issues.
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