Abstract
A 2.5 GeV electron storage ring fully dedicated to synchrotron radiation researches is being constructed at KEK-PF, Synchrotron Radiation Center (Photon Factory), National Laboratory for High Energy Physics (KEK). The storage ring has an ellipse shape, the diameter of which is 68 m (long) and 50 m (short). The critical wavelength of synchrotron radiations generated from bending magnets is 2.98 Å. The storage ring has eight medium straight sections and two long straight sections. In the first stage of the Photon Factory Project, a vertical wiggler magnet with superconducting coils was set in one of the medium straight sections. The wiggler magnet produces 6 t fields and generates intense synchrotron radiations with the critical wavelength of 0.5 Å. As a whole, users take advantage of intense synchrotron radiations whose wavelength ranges from 0.1–1000 Å. This means that studies of matters at the atomic and molecular level can be done in many scientific fields. The accumulating electron beam is expected to be 500 mA and the total radiation power 260 kW. In the second stage of the project, two long straight sections and four medium straight sections will be used for new devices in the synchrotron radiation facility.
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