Development of Multilayer Monochromators and Super Mirror Guides for Diffraction Studies

多层器件是通过交替沉积两种材料的薄膜制成的。多层单色器已经被制造成d-间距在60-200埃范围内，反射率大于95%。在小角散射实验中使用这种单色器导致了增加的通量和更好的光谱仪分辨率。自动射频溅射系统将用于制作一系列光谱仪专用的多层膜。这些多层将包括：用于小角度站的多个d间隔多层，其将增加高波长范围内的通量;沿其长度具有d间隔沿着渐变的多层;具有由超级反射镜制成的顶表面和底表面的导管;以及用于会聚光束的垂直扩展的聚焦多层。光谱仪可用于生物学研究大分子，如DNA，蛋白质，脂质复合物，病毒颗粒和聚合物。多层单色器是光谱仪的组成部分，它确定用于研究高分子样品的中子束的波长。中子谱仪分辨率的提高将提高其结构工作的效率。

Multilayer devices are made by depositing thin films of two materials in an alternating sequence. Multilayer monochromators have been fabricated with d-spacings within the 60-200 Angstrom range with reflectivities greater than 95%. The use of such monochromators in small angle scattering experiments has resulted in an increased flux and better resolution of the spectrometer. The automated rf sputtering system will be used to make a series of spectrometer-specific multilayers. These multilayers will include: multiple d-spacing multilayers for the small angle station which will increase the flux in the high wavelength range; multilayers with a gradation of d-spacings along their length; guidetubes with top and bottom surfaces made of supermirrors; and focussing multilayers for converging the vertical spread of the beam. Spectrometers can be used in biology to study macromolecules such as DNA, proteins, lipid complexes, virus particles, and polymers. Multilayer monochromators are components of spectrometers which determine the wavelength of the neutron beam used to study macromolecule samples. Improvement in the resolution of the neutron spectrometer will increase its efficacy for structural work.