SEALS: A high brightness, low cost, light source proposal for southeastern USA

To cater for the increasing demand for synchrotron light in the Southeastern USA a study is being made for a new high-performance source. It will need to span both the soft X-ray region (1–2 keV) and the X-ray region up to at least 13 keV. A high brightness third-generation source is described which exhibits a beam emittance less than 10 nm rad at an energy of 2.5 GeV. By using a lattice cell derived from the Theoretical Minimum Emittance type, this performance is achieved in a circumference of less than 170 m. The economical, yet flexible, lattice uses vertically focusing gradient in the dipoles. The lattice functions and other parameters are presented for both a 12 cell Double Bend design and a 10 cell Triple Bend. The 12 cell gives a horizontal emittance of 7.8 nm rad and the 10 cell 4.6 nm rad. The dynamical stability of both lattices is described together with the beam performance from the anticipated insertion devices. The current status of the proposal is explained.