We present energy spread and bunch length measurements at the Accelerator Test Facility (ATF) at KEK, as functions of current, for different ring rf voltages, and with the beam both on and off the coupling resonance. We fit the on-coupling bunch shapes to those of an impedance model consisting of a resistor and an inductor connected in series. We find that the fits are reasonably good, but that the resulting impedance is unexpectedly large.
@article{arxiv.physics/0105102,
title = {Impedance Analysis of Bunch Length Measurements at the ATF Damping Ring},
author = {K. L. F. Bane and T. Naito and T. Okugi and Q. Qin and J. Urakawa},
journal= {arXiv preprint arXiv:physics/0105102},
year = {2007}
}
Comments
9 pages, 5 figures, presented at 10th International Symposium on Applied Electromagnetics and Mechanics (ISEM2001)