SSRL BL4-2 Biological Small Angle Scattering/Diffraction

W/B4C Multilayers

We have recently switched to W/B4C, which has improved properties over Mo/B4C.              
Multilayer Diffraction pattern Intensity Profile
Mo/B4C multilayers Collagen fiber diffraction pattern recorded using the Mo/B4C multilayers One dimensional intensity profile 
of the collagen fiber diffraction pattern obtained with beam from the Mo/B4C multilayers 
The broadening of the diffraction peaks from dried collagen fiber due to the increased energy bandpass is insignificant, assuring high beam quality with the multilayer monochromator. We typically obtain 20-30 times higher flux with the multilayer monochromator.

Reference: "A wide-bandpass multilayer monochromator for biological small-angle scattering and fiber diffraction studies." H. Tsuruta, S. Brennan, Z.U. Rek, T.C. Irving, W.H. Tompkins, K.O. Hodgson, J. Appl. Cryst. 31, 672-682 (1998).