Beam position monitoring system upgrade for the TLS

Taiwan light source (TLS) is equipped with 59 beam position monitors (BPM). The existing Bergos´s multiplexing BPM electronics are working well during the last decade. To improve the functionality of the BPM system, Libera electron will be employed to replace some existing multiplexing BPM electronics to enhance system functionalities. Reflective memory is also applied to seamlessly integrate two kinds of electronics in the meanwhile. The high precision closed orbits were measured by multiplexing BPM via multi-channel PMC form factor 16-bits ADC modules and gigabit Ethernet fast access channels of Libera electron. Turn-by-turn beam position measurement is also supported by new BPM electronics. Tune measurement is also possible by spectra analysis of the turn-by-turn beam position data. The preliminary version of the orbit data was sampled every millisecond. Fast orbit data were shared by reflective memory network for fast orbit feedback application. Averaged data were updated to control database at a rate of 10 Hz. The system structure, software environment and preliminary beam test of the BPM system are summarized in this report.