Stability design of switchyard in SGⅢ facility

Study of Stability of Precise Tiled-grating Device

“…This result shows that the angular deflection responses around the X and Y axes are 0.243 μrad and 1.46×10 -3 μrad respectively, which satisfy the design requirement [10] of the SG-III system that the singleangle drift be less than 0.48 μrad.…”

“…3 along the top edge of each grating) have amplitudes that are as large as 5.2 and 9.1 μm, respectively. Both of these amplitudes are less than 12.9 μm; therefore, the two devices meet the requirement given in [10]. Additionally, the tetrahedral mount has an important characteristic: the tetrahedral brace is a trussed structure; it helps in effectively decreasing the weight and enhancing the natural frequency of the structure.…”

“…While the tiled-grating environment is standardized, there are many parameters that can change. The working environment of precise tiled gratings is subject to various disturbances [10] to [12]. All disturbances will impact the stability to a certain extent.…”