Synchronous beam diagnostic system using cordless telephones at SPring-8

Recently, we have developed a synchronous SR beam position diagnostic system. In this system, more than one X-ray beam position monitor is used synchronously and an oscillation of the SR beam position all through the storage ring can be detected. For an example, during the high speed driving of the insertion device, beam oscillation and shift can be simultaneously observed at different beamlines. To start the measurements simultaneously at the different beamlines, a trigger signal was conveyed by a cordless telephone. This paper describes the system and performance tests of it.