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Technical Report: UV and VUV Radiometry Programs at the Synchrotron Ultraviolet Radiation Facility (SURF III)

Synchrotron radiation was recognized as an important tool for radiometry shortly after the advent of dedicated storage rings as radiation sources more than four decades ago. [1] Initially, synchrotron radiation was conceived as a calculable primary standard for absolute calibration of radiation sources. With the explosion of synchrotron radiation facilities around the globe during the last several decades, synchrotron-radiation-based radiometry has been actively pursued among many national standard laboratories in countries including the U.S., Germany, the U.K., Japan, and Russia because of increasing demands from semiconductor photolithography, UV curing industry, medical diagnostics and treatments, and solar radiation monitoring. To date, the use of synchrotron radiation for radiometry is no longer limited to a primary radiation standard. Dispersed synchrotron radiation, although usually not calculable, provides radiation from IR to X-rays for radiometric characterization of detector response and material optical properties.