Calibration of beam position indicators for insertion devices of Indus-2

Two insertion devices (undulators named U-l and U-2) have been recently installed in Indus-2 synchrotron radiation source, a 2.5 GeV third generation electron storage ring at Raja Ramanna Centre for Advanced Technology, Indore. Four ultra-high vacuum compatible beam position indicators (IDBPIs) for insertion devices have been designed and developed. These IDBPIs have been installed in the long straight sections LS-2 and LS-3 of Indus-2 ring at the upstream side and downstream side of undulators for the precise monitoring of electron beam position. The IDBPIs have been calibrated on a calibration bench setup before their installation in Indus-2 ring. The calibration procedure along with the calibration results has been described in this paper