CURRENT STATUS AND UPGRADE PLAN OF THE DATA-ACQUISITION SYSTEM AT SACLA

User experiments at the SPring-8 angstrom compact free electron laser (SACLA) facility were recently commenced, in March 2012. We have developed a dedicated dataacquisition system that can be used for user experiments. This system is currently capable of acquiring data from 10 multiport charge-coupled device sensors at a data rate of up to 5 gigabits per second (Gb/s). In this paper, we present an overview of this data-acquisition system.