Transmission multilayer polarizers for use in the 55–90 eV region

Abstract

Free-standing Al/YB6 and Mo/Si transmission multilayer polarizers have been developed for use in the photon energy regions 55–72 eV and 72–90 eV, respectively, to improve the degree of polarization of synchrotron radiation light from beamline monochromators. The polarizance (polarizing ability) and transmittance of the Al/YB6 multilayer for unpolarized light at 64 eV were 77% and 3.4%, respectively, and the polarizance and transmittance of the Mo/Si multilayer at 80 eV were 79% and 2.2%, respectively. By using the Mo/Si polarizer, the degree of polarization of the monochromated light at BL8B1 of UVSOR was increased from 95 to 99% in the 78–84 eV region.