CONSTRUCTION OF THE JAERI SOFT-X-RAY BEAMLINE FOR ACTINIDE MATERIAL SCIENCES

An undulator beamline for spectroscopy studies focusing on the electro nic structure of actinide materials is under construction. Linearly or circularly polarized soft X-rays are provided by employing a variably polarizing undulator. Varied-line-spacing plane gratings and a sagitt al-focusing system are used to monochromatize the undulator beam, whos e energy ranges from 0.3 to 1.5 keV. A resolving power of 10(4) is exp ected in the whole energy region. These components are methodically op erated by the SPring-8 beamline control system. There are three experi mental stations in the beamline. In one of the stations the photoemiss ion spectroscopy experiments are carried out at a radioisotope-control led area where actinide compounds as well as unsealed radioactive mate rials are usable. Other experimental stations are planned in the beaml ine for surface photochemical reactions and biological applications.