Development of a new transfer standard for high UV irradiances |
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Authors: | Saulius Nevas Peter Sperfeld |
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Affiliation: | 1.Physikalisch-Technische Bundesanstalt (PTB),Braunschweig,Germany |
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Abstract: | Source-based radiometry requires reliable transfer standards which are easy to handle. For low irradiances in the UV spectral
range, 30 W deuterium lamps are commonly used. However, for the growing field of high UV irradiance applications, new high
power standards are required. Here we report on a Xe-Hg lamp system which has been characterised and improved to match the
high requirements of a working standard. For this purpose, several parameters of the system such as lamp stability, re-ignition
reproducibility, irradiance uniformity and usability have been investigated. Components for the customised light guide-based
output optics have been selected with the help of extensive characterisations. The resulting lamp system can be used for a
high-grade instrument calibration at high UV irradiance levels. |
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