REVIEW OF THE LONGITUDINAL IMPEDANCE BUDGET OF THE ELETTRA STORAGE RING

Changes in the longitudinal impedance budget occur due to the changes in the machine structure. Following the in-stallation in ELETTRA storage ring of the new vacuum chambers in the last three years, estimation of the longitu-dinal loss factor are carried out. The measurements are per-formed by mapping the horizontal closed orbit deviation, taking full advantage of the newly installed high resolution BPM electron system. The current results are compared with those of the previous measurements and presented in this paper