Measurement of bunch time-structure in KFK PF

A photon counting system was installed in the Photon Factory storage ring at the KEK for precise measurement of the time-structure of bunches. Photons emitted in a bending section are detected with a microchannel-plate photomultiplier. The time interval between the output of the photomultiplier and the signal synchronized to the revolution frequency of the ring is converted to the pulse height. The distribution of the pulse height which corresponds to the time-structure of bunches in the ring is analyzed by a multichannel analyzer. In addition to the bunch length measurement, the single bunch impurity was also successfully measured since the system has an excellent dynamic range.<
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