Lattice design for Pohang Synchrotron Light Source

For the 2-2.5-GeV Phang Light Source, a 12-period triple-bend achromat lattice is designed with flat dipole magnets to avoid possible difficulties associated with combined functions dipoles. In this arrangement, a quadrupole triplet is introduced per half achromat section for flexibility in tune and emittance. This lattice configuration yields weak sextupole strengths and shows good chromatic behavior in tune versus momentum. An electron beam emittance of 13*10/sup -9/ m-rad at 2 GeV is achieved with a large dynamic aperture.<>