DEVELOPMENT OF A COMPACT MULTILAYER MIRROR (MLM) POLARIMETER IN THE
EXTREME ULTRAVIOLET (EUV) RANGE


H. Merabet*, M. Bailey#, and R. Bruch*


*Department of Physics, University of Nevada Reno, Reno NV 89557 USA
#Atmospheric Science Center, Desert Research Institute (DRI), Reno NV
89506 USA


A molybdenum/silicon (Mo/Si) multilayer mirror (MLM) polarimeter has been
constructed, characterized and used to analyze the extreme ultraviolet
(EUV) emission from excited He and He+ states following e- + He collisions
for wavelengths ranging from approximately 25.6 nm to 58.4 nm.  A ratio of
reflectivities for s and p polarized light, Rs/Rp=10, and a resolving
power of lambda/delta lambda =6 at 30.4 nm were obtained.  These
characteristics and the use of a VYNS1 spectral filter were sufficient to
allow a detailed polarization study of the first two members of the Lyman
series of He+ at wavelengths of 30.4 and 25.6 nm.