Multilayer X-ray optics at CHESS.
Almost half of the X-ray beamlines at the Cornell High Energy Synchrotron Source (CHESS) are based on multilayer optics. ;Traditional' multilayers with an energy resolution of DeltaE/E approximately 2% are routinely used to deliver X-ray flux enhanced by a factor of 10(2) in comparison with standard Si(111) optics. Sagittal-focusing multilayers with fixed radius provide an additional factor of 10 gain in flux density. High-resolution multilayer optics with DeltaE/E approximately 0.2% are now routinely used by MacCHESS crystallographers. New wide-bandpass multilayers with DeltaE/E = 5% and 10% have been designed and tested for potential applications in macromolecular crystallography. Small d-spacing multilayers with d < or = 20 A have been successfully used to extend the energy range of multilayer optics. Analysis of the main characteristics of the Mo/B4C and W/B4C small d-spacing multilayer optics shows enhancement in their performance at higher energies. Chemical vapour deposited SiC, with a bulk thermal conductivity of a factor of two higher than that of silicon, has been successfully introduced as a substrate material for multilayer optics. Characteristics of different types of multilayer optics at CHESS beamlines and their applications in a variety of scattering, diffraction and imaging techniques are discussed.
Kazimirov
Alexander
A
Cornell High Energy Synchrotron Source (CHESS), Cornell University, Ithaca, NY 14853-8001, USA. ayk7@cornell.edu
Smilgies
Detlef M
DM
Shen
Qun
Q
Xiao
Xianghui
X
Hao
Quan
Q
Fontes
Ernest
E
Bilderback
Donald H
DH
Gruner
Sol M
SM
Platonov
Yuriy
Y
Martynov
Vladimir V
VV
D018360:Crystallography, X-Ray / Q000379:methods*; D046911:Macromolecular Substances / Q000737:chemistry*; D055095:Optics and Photonics; D011487:Protein Conformation; D017356:Synchrotrons
D046911:Macromolecular Substances