ABSTRACT
A new technology for generating steady state, brilliant, broadband, coherent, far-infrared (FIR) radiation in electron storage rings is presented, suitable for FIR spectroscopy. An FIR power increase of up to 100 000 compared to the normal, incoherent synchrotron radiation in the range of approximately 5 to approximately 40 cm(-1) could be achieved. The source is up to 1000 times more brillant compared to a standard Hg arc lamp. The coherent synchrotron radiation is produced in a "low alpha" optics mode of the synchrotron light source BESSY, by bunch shortening and non-Gaussian bunch deformation.
ABSTRACT
The new multipurpose infrared (IR) beamlineat the electron storage ring BESSY IIprovides highly brilliant infrared radiation forstructural and time resolved studies in thebiological and material science. With this facility newresearch possibilities at BESSY are madeavailable to the scientific community.
ABSTRACT
The optical constants in the infrared spectral range and the thickness of a surface layer are simultaneously determined by reflection based spectroscopic infrared ellipsometry. In the past experimental progress has been used to increase sensitivity with the aim to detect ever thinner layers. Reaching the monolayer limit by now, methodic efforts focus on revealing structural details such as anisotropy and lateral heterogeneity caused primarily by molecular orientational order. The basis of the method and present methodical approaches are outlined. Aspects of using synchrotron radiation for infrared ellipsometry and of setting up an infrared beamline are discussed.
ABSTRACT
For BESSY II, synchrotron radiation beam diagnostics will be incorporated in both the insertion-device front ends and the dipole-beamline front ends. In order to gain a complete picture of the source characteristics, a diagnostic front end has been designed and tested for dipole radiation. This consists of (i) a pinhole array imaging system, (ii) a double-blade system for the determination of the vertical center of gravity of the synchrotron radiation fan, and (iii) a Bragg-Fresnel multilayer system for the most precise image information about the source size and shape.
