Figure 6 Optics of a normal cell with a 10 m straight section in PF-HLS. The figure shows three optical functions: and (square root of the horizontal and vertical betatron functions, respectively) and ηx (horizontal dispersion function). The emittance change calculations assumed the installation of a V-SC-MPW in either the 10 m achromatic straight section or the 2 m non-achromatic straight section located at both ends of the cell.