포항가속기 디지털 빔위치 측정장치

The 108 multiplexed Beam Position Monitor (BPM) electronic modules and 2 digital BPM modules are installed to diagnose the beam position around Pohang Light Source (PLS) storage ring. To provide high quality beam to beam users, the stable orbit is maintained through the orbit feedback controlled correction Power Supply (PS) and steering PS after precise readout of the beam position. The multiplexed BPM analog output signal is scaled about the order of Volt/mm. To maintain the sub-micron orbit, a few hundred measurements should be done through analog and digital filter. In this paper, PLS Control/Measurement system are introduced for beam operation to measure sub-micron beam position and the new beam position monitoring hardware with the high resolution (＞18-bit) is presented by using of analog/digital filter. Also the measurement data of the advanced Digital BPM is presented.