Generation of high-energy synchrotron radiation with a 10-T superconducting wiggler installed in the SPring-8 storage ring

A three-pole 10-T superconducting wiggler was installed in the 8-GeV electron storage ring at SPring-8 for generating high-energy synchrotron radiation. Beam tests were carried out to check its performance and to investigate the effects on a stored beam. A beam was successfully stored at magnetic fields of the wiggler up to 9.7 T. The beam current was limited to 1 mA to avoid unnecessarily high heat-load on photon absorbers and radiation damage to accelerator components. Beam parameters such as a horizontal beam size, a bunch length, betatron tune shifts were measured. A spectrum of high-energy synchrotron radiation from the wiggler was also measured with the NaI scintillator at an extremely low beam current of about 8 pA.