New Time-Resolved Small-Angle Station with the Use of Synchrotron Radiation of the Siberia-2 Storage Ring for Investigation of Biological Structures

摘要

The DICSI small-angle station is developed at the 1.3a beamline of the Siberia-2 storage ring at the Kurchatov Center of Synchrotron Radiation(Russia).The station is intended for X-ray diffraction investigations of the structural dynamics of biological objects with a high time resolution in the small-angle range.The DICSI station is a new version of the station which is based on our previous experience in the development of different stations at the Siberian Synchrotron Center.The OD-3 coordinate detector is used to record the diffraction patterns.The synchrotron beam is monochromatized and collimated with the use of X-ray optical elements,including the system of primary collimators with a focusing monochromator,the polysectional system of focusing mirrors of total external reflection,forming and background slits,a beam attenuator,a primary-beam stop,and evacuated tubes for beam transmission.The station provides measurement of spacings from 1.0 to 100.0 nm in the wavelength range 0.10-0.25 nm with a spectral width DELTA lambda/lambda=10~(-3)-10~(-4).