Parameters of the Silicon Polarizer
The general view of compact multichannel polarizer on the base of
supermirrors 54FeFe/Al on silicon substrates with absorbing
Cd sublayer is shown. The critical angle of this supermirror coating
equals m=1.7. The silicon flat wafers pressed each to other without
air interruptions between massive Al plates. In this type polarizer
neutrons come through silicon only. The polarizing cross-section of
this polarizer for cold neutrons equals
width * height = 8*50 mm2 and length of it is only 21 mm!
The magnitude of saturated field is 250 Oe.
Transmission T and polarizing efficiency P of such type polarizer
are shown. As follows from this figure, the polarizing efficiency
P is very high in the wide range of wavelengths and it is not worse
then polarizing efficiency of supermirrors FeCoV/TiZr.