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Excitation and Detection of a Transverse Quadrupole-Mode Bunch Oscillation in the KEK Photon Factory Storage Ring

2003; Institute of Physics; Volume: 42; Issue: Part 1, No. 4A Linguagem: Inglês

10.1143/jjap.42.1757

1347-4065

S. Sakanaka, Yukinori Kobayashi, T. Mitsuhashi, T. Obina,

Gyrotron and Vacuum Electronics Research

In order to investigate the possibility of exciting transverse higher-mode bunch oscillations for electron beams, we carried out a trial experiment in the Photon Factory (PF) storage ring at the High Energy Accelerator Research Organization (KEK). While storing a single bunch of electrons, we modulated the betatron tune at a frequency of two-times the fractional betatron frequency, using a high-frequency quadrupole magnet. The bunch oscillations excited were measured by detecting visible synchrotron light with a streak camera. As a result, a transverse quadrupole-mode oscillation of the bunch was clearly detected. This technique will be useful for studying the properties of the transverse higher-mode bunch oscillations in the electron storage rings.