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Proceedings Paper

XUV Radiometric Standards at NBS
Author(s): W. R. Ott; L. R. Canfield; S. C. Ebner; L. R. Hughey; R. P. Madden
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Paper Abstract

The National Bureau of Standards supports a research and development program in the vacuum ultraviolet and soft x-ray region of the spectrum with the goal of providing radiometric source and detector standards for measurement applications. Windowless photodiodes are calibrated for absolute quantum efficiency in the spectral range 5 nm-122 nm (250 eV-10 eV) with estimated uncertainties of 8-15%. The primary standard used in these calibrations is a rare gas ionization chamber. The measurement program utilizes the NBS 300 MeV Synchrotron Ultraviolet Radiation Facility, SURF II, which has two dedicated beam lines for radiometric research and calibration activities. One of these beam lines supports detector radiometry. The second is dedicated to the calibration of spectrometric instruments in the wavelength range from about 4 nm (300 eV) up into the visible. The photon flux of the synchrotron radiation beam at the entrance aperture of the user's instrument is known to within an uncertainty of from 2 to 6%, depending upon wavelength. The presentation will review these instrument and detector calibration services and also describe several soft x-ray measurement-related research projects where NBS staff and visiting scientists have been active.

Paper Details

Date Published: 12 August 1986
PDF: 10 pages
Proc. SPIE 0689, X-Ray Calibration: Techniques, Sources, and Detectors, (12 August 1986); doi: 10.1117/12.936580
Show Author Affiliations
W. R. Ott, National Bureau of Standards (United States)
L. R. Canfield, National Bureau of Standards (United States)
S. C. Ebner, National Bureau of Standards (United States)
L. R. Hughey, National Bureau of Standards (United States)
R. P. Madden, National Bureau of Standards (United States)


Published in SPIE Proceedings Vol. 0689:
X-Ray Calibration: Techniques, Sources, and Detectors
Ping Lee; Paul D. Rockett, Editor(s)

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