Beam Position Monitor at the PLS BTL

Electron Linac at the Pohnag Accelerator Laboratory (PAL) has been operated continuously as full energy for storage ring, 2.0-GeV since 1994 Dec. and 2.5-GeV since 2002 Oct. At the BTL, BCM (Beam Current Monitor), BLM (Beam Loss Monitor), BPRM (Beam Profile Monitor) and BPM (Beam Position Monitor) are used for beam operation. Thirteen BPMs has been installed from Linac end to BTL end at Aug. 2004. In order to measure of the beam position, 500 MHz Log-Ration (LR) BPM boards are used. Data acquisition system consists of NI S-series data acquisition board and NI Lab-View Version 7.1. For monitoring of BPM data at EPICS control system, BPM data acquisition system is developed as EPICS IOC. BTL BPMs are going to use optic correction and beam energy feedback at PLS normal beam operation.