T. Obina et al., MEASUREMENT OF THE LONGITUDINAL BUNCH STRUCTURE IN THE PHOTON-FACTORYPOSITRON STORAGE-RING WITH A PHOTON-COUNTING METHOD, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 354(2-3), 1995, pp. 204-214
A photon counting system for measuring the time structure of bunches,
such as the single-bunch impurity and the longitudinal distribution of
electrons, was installed and has been improving in the KEK PF positro
n storage ring. Agreement between the experimental results concerning
the rate of impurity growth and a calculation taking account of the re
lativistic effects of electron-electron scattering, which is the origi
n of the impurity growth, was fairly good. A deformation of the distri
bution at a high beam current was observed, and was analyzed phenomeno
logically.