Development of an x-ray beam position monitor for TPS EPU beamline front ends

In order to develop state-of-the-art x-ray beam position monitors (XBPMs) for the Taiwan Photon Source (TPS) project, the National Synchrotron Radiation Research Center (NSRRC) and the Advance Photon Source have established a collaboration project to design and test various XBPMs for the TPS beamline front ends. One of the XBPM prototypes is dedicated to the elliptically polarized undulator (EPU) beamline front ends to be constructed at the TPS. In this paper, we present the design of the XBPM prototype. Preliminary test results for the prototype are also discussed.