Abstract

The design and construction of a VUV source and a VUV monochromator is reported. The reliability of the VUV source suggests that it can be used as a VUV high radiance transfer secondary standard. A VUV window is used to isolate the high pressure argon-arc source from the VUV monochromator. The spectrum is therefore limited by the transmission cut-off of the window. Alternatively, a differential pump could be used to extend the wavelength range to the extreme UV and eliminate the uncertainties associated with the aging effects of the VUV window. The apparatus is to be used to measure the VUV spectra of certain glass samples.

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