Abstract
A new accelerator complex project to provide photons of which the energy range covers far‐infrared, VUV, X‐ray and hundreds MeV has been developed at Tohoku University. Based on an infrastructure of an accelerator facility, Laboratory of Nuclear Science (LNS), a new injector linac and a light source storage ring are designed. The 150 MeV injector linac may contain a thermionic RF gun to have simple configuration of accelerating structure. The RF gun allows us to operate infrared free electron laser (FEL). A 1.5 GeV storage ring is designed to realize relatively low emittance and capability of inserting a couple of superconducting wigglers for x‐ray. Furthermore a storage ring FEL is also taken account to provide coherent higher harmonic photons and high energy gamma‐rays via Compton backscattering and Bremsstrahlung. At the present, the lattice of the storage ring is considered to have eight‐hold Chasman‐Green cells and two 8 m‐long straight sections. Because of limited budget and site area, the storage ring should be small, so that we will employ multipole magnets which produce both quadrupole and sextupole magnetic fields.
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