Study of Lower Emittance Optics Using Multi-Bend-Achromat Lattice at SOLEIL

In the scope of a possible future upgrade, the use of MBA (Multi-Bend-Achromat) lattice is attempted in exploring new optics with the horizontal emittance in the sub-nanometer range for SOLEIL. With a combination of 4 and 5BA cells, a solution reaching 0.52 nm rad emittance is found, achieving more than one order of magnitude of reduction in the effective emittance as compared to the present optics. Steps and considerations in developing the lattice, as well as some of the linear properties of the obtained optics are discussed.