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A toroidally bent cylindrical mirror system has been developed for the 4.1–12.4 keV region at NSRL. The design of the bending mechanism of a quasi four-bar bender with compensation of gravity by a method of balance is described in detail as well as its support architecture which is desirable that all degrees of freedom are independently adjustable with a minimum of cross-coupling between adjustments. Simulation on the performance of bending by FEM (Finite Element Method) and measurement results by LTP (Long Trace Profiler) are presented. The thermal effects on optical surface and some ongoing improvement of this system are also discussed briefly. © 2007 American Institute of Physics [ABSTRACT FROM AUTHOR]

X-ray diffraction has been conducted to study the microscopic-scale structures for 0.72Pb(Mg1/3Nb2/3)O3-0.28PbTiO3 relaxor ferroelectrics in a high external DC field during phase transition. Clear quasi-periodic structures were observed along <111> and <1-11> directions near Tc induced by the high external DC field. The formation of these periodic structures are interpreted as a type of Coulomb interaction among adjacent polar clusters. The cluster size was estimated to be 17nm. It was also found that the dominating interaction direction among clusters (periodic direction) were changeable among <111> and <1-11> as temperature changed. © 2007 American Institute of Physics [ABSTRACT FROM AUTHOR]

Extending the spectral range to hard X-ray, a superconducting wiggler was constructed and installed at the 0.8 Gev storage ring of National Synchrotron Radiation Laboratory to produce a radiation with the critical energy of 2.55 keV. The wiggler radiation fan of horizontal 35 mrad has been split into three branches to be equipped with three beamlines for studies on extended X-ray absorption fine structure (XAFS), X-ray diffraction and scattering (XRDS) and X-ray deep lithography (LIGA), respectively. This paper reports the design, the results of performance tests of the XRDS beamline and the preliminary data collection on a protein crystal of acutohaemolysin at the experiment station. © 2004 American Institute of Physics [ABSTRACT FROM AUTHOR]