BEAMLINE FOR CALIBRATION OF TRANSFER STANDARD LIGHT-SOURCES IN THE UVAND VUV REGIONS

A beamline which serves for calibrating transfer standard light source s (deuterium lamps, excimer lamps, Xe lamps etc.) in the UV and VUV re gions is being constructed. The synchrotron radiation from the electro n storage ring TERAS (750 MeV) is used as a primary standard of spectr al radiant intensity. In order to use synchrotron radiation as a prima ry standard, the electron beam and synchrotron radiation beam paramete rs need to be evaluated. Uncertainties of synchrotron radiation flux e valuated by measurements of the magnetic flux density, the position of the electron orbital plane, the electron beam size and the distance f rom the synchrotron radiation tangent point to the detector system are expected to be about 0.003, 0.01, 0.05 and 0.1%, respectively.