UV/VUV radiometric calibrations at SURF II

Mitchell L. Furst; L. Randall Canfield

doi:10.1117/12.140856

22 January 1993 UV/VUV radiometric calibrations at SURF II

Mitchell L. Furst, L. Randall Canfield

Author Affiliations +

Proceedings Volume 1764, Ultraviolet Technology IV; (1993) https://doi.org/10.1117/12.140856
Event: San Diego '92, 1992, San Diego, CA, United States

Abstract

Since 1981 more than 150 instrument calibrations have been performed on the radiometric instrumentation calibration beamline at the Synchrotron Ultraviolet Radiation Facility (SURF II) at the National Institute of Standards and Technology (NIST) in Gaithersburg, Maryland. This 300 MeV electron storage ring operates routinely at electron currents greater than 250 mA. The spectrometer calibration beamline provides a continuum of radiation from 4 nm through the visual spectral region in the form of an intense beam with total angular divergence of 1.2 mrad. The probable uncertainty for the flux ranges from about 5 percent at 4 nm to less than 2 percent above 20 nm. The new system will radiometrically trace to SURF II, and thus is expected to reduce the calibration uncertainty for diodes in this region by a factor of five to the 1-2 percent level.

Citation Download Citation

Mitchell L. Furst and L. Randall Canfield "UV/VUV radiometric calibrations at SURF II", Proc. SPIE 1764, Ultraviolet Technology IV, (22 January 1993); https://doi.org/10.1117/12.140856

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