The radiocarbon AMS facility at Institute of Physics (IOP), Bhubaneswar has been recently made available to the users for dating applications. The facility is based on the 3MV NEC pelletron accelerator and is used for radiocarbon AMS apart from its use for surface/materials science research. A graphite preparation line has been set up for sample preparation, based on the standard procedure of reducing CO₂ by H₂ gas and a large number of OX-I, OX-II and other samples have been processed so far. The conversion efficiency of CO₂ to graphite is better than 95%.The graphite lab can process four samples per day. The results of the samples received from other laboratories have been compared and shown to be in fairly good agreement. Using this facility, we have recently dated foraminifera samples sent by National Institute of Oceanography, Goa which were collected from the surface bottom of Eastern Bay of Bengal near Myanmar. The objective of this study is to understand the past climatic conditions. In another study aimed at determining the uplift rate of Andaman and Nicobar islands, Centre for Earth Science Studies (CESS), Trivandrum has collected calcareous samples from Car Nicobar Islands in Bay of Bengal. These samples have also been dated. A number of archaeological samples have been received and are being processed for dating.

Some difficulties arise in doing AMS on the same accelerator along with other Ion Beam Analysis (IBA) experiments since most of the later studies are done at lower terminal potentials than required for AMS. The prolonged operation of the machine at < 1MV potential by other users lead to several frequent laborious maintenance shutdowns before AMS experiments could be carried out. To tackle the terminal potential instability problem, we have come up with a simple solution of cleaning up the terminal cylinder through the corona probe port. This procedure has improved the terminal stability to better than 1 kV. The present paper will describe the salient features of the facility along with the results obtained so far.