Review of alignment activities for indus-1 and 2 at CAT

Survey and alignment activities at CAT (Centre for Advanced Technology - India) are related to two accelerator projects called INDUS-1 and INDUS -2. Former is a 450 MeV SRS and latter is a 2.5 GeV SRS. Both the machines use a 450/700 MeV booster synchrotron and 20 MeV pre-injector microtron for injection. Indus-1 was commissioned with 100 mA stored beam current in May 1999. Indus-2 is under construction and expected to be commissioned within next 4 years. Survey and alignment work of booster synchrotron and Indus-1 (storage ring) was accomplished using optical surveying techniques with software ECDS-2 of Kern. That was possible due to small size of machines of Indus-1. For Indus-2 with circumference of 172.47 m, the network surveying and alignment scheme has been planned. Indus-2 is a high brilliance machine and this puts more stringent requirements on alignment. This paper describes methodology and performance results of Indus-1 alignment and strategy for Indus-2. (authors)