Alignment procedures

Survey and alignment procedure adopted for different machines varies depending upon their shapes and sizes. The Booster Synchrotron and Indus-I machines are relatively smaller in size so, these machines were aligned using online coordinate determination system based on angle measurements and without use of control networks. However, Indus-2, which is comparatively larger and installed in an over-ground tunnel, required a network of control points to cover the entire machine for controlling the overall shape and size of the machine. A lot of redundant measurements were taken and treated with least square adjustment to achieve best unbiased coordinate for the control points and ring components which are used for computation of misalignment of components and deformation of the machine.