@incollection{Hartmann2003,
  author    = {Hartmann, J{\"u}rgen},
  title     = {Comparison of the New NPL Primary Standard Ag Fixed-Point Blackbody Source with the Primary Standard Fixed},
  booktitle = {Temperature: Its measurement and control in science and industry, volume 7},
  editor    = {Ripple, Dean C.},
  publisher = {American Institute of Physics},
  isbn      = {0-7354-0153-5},
  publisher      = {Hochschule f{\"u}r Angewandte Wissenschaften W{\"u}rzburg-Schweinfurt},
  year      = {2003},
  abstract  = {Above the freezing point of silver (96178 C), the International Temperature Scale of 1990 is defined in terms of Planck's radiation law. The scale is maintained and disseminated using a validated and linear pyrometer in conjunction with a blackbody reference source at either the Ag, Au (1064.18 C) or Cu (1084.62 C) freezing point. In order to realize the scale with the highest precision high quality, well-characterised, reproducible fixed-point blackbody sources are required. Such sources have been maintained at NPL for a number of years, but it was felt that improvements to the design would be beneficial. A new Agpoint blackbody source has therefore been constructed. The new design will improve the quality and reproducibility of the melting and freezing plateaux and reduce errors due to the "out-of-focus" size-of-source effect which is difficult to measure and to eliminate. Full details of the design of the new source …},
  language  = {en}
}