| Zugriffsnummer | 30209 |
| Dokumenttyp | Konferenzartikel in Zeitschrift |
| Sprache | Englisch |
| Titel | The double-heatpipe black body: a high-accuracy standard source of spectral irradiance for measurements of T − T90.noitalic |
| Autor(in); Institution |
Stock, Michael; 9.21, Strahlungsthermometrie, PTB-Berlin
Fischer, Joachim; 9.21, Strahlungsthermometrie, PTB-Berlin
Friedrich, Rüdiger; 9.21, Strahlungsthermometrie, PTB-Berlin
Jung, Hans-Joachim; 9.21, Strahlungsthermometrie, PTB-Berlin
Wende, Burkhard; 9.2, Thermometrie und Strahlung, PTB-Berlin
|
| Quelle/Jahr | Metrologia: 32 (1995), 6, 441 - 444 |
| ISSN | 0026-1394 (PRINT) ; 1681-7575 (ONLINE) |
| DOI | |
| Verlag | Bristol [u.a.]: IOP Publishing |
| Konferenzangaben | 5th International Conference on Radiometry, Berlin, September, 19-21, 1994, Germany |
| Klassifikationscode | PACS: 07.20.Dt ; PACS: 44.40.+a ; PACS: 07.60.Dq ; PACS: 06.20.F- ; PACS: 07.20.Mc |
| Freie Schlagworte | Instrumentation and measurement ; Statistical physics and nonlinear systems |
| Zusammenfassung | The Physikalisch-Technische Bundesanstalt (PTB) has developed a large-area black body (LABB) for accurate realization of the spectral irradiance in the red and near-infrared spectral range. Its temperature is measured by standard Pt-resistance thermometers according to the International Temperature Scale of 1990 (ITS-90). The black body consists of two concentric sodium heatpipes, the inner one with temperature stability of ±2 mK forming the radiating cavity. The relative uncertainty of the spectral irradiance of the LABB in the red spectral range is 6 × 10-4 at the freezing point of silver, the largest contribution resulting from the thermodynamic uncertainty of the temperature scale. This allows the ITS-90 to be checked by a comparison of the LABB with a cryogenic radiometer using calibrated filter radiometers as transfer standards. The thermodynamic temperatures obtained in the range 660 °C to 962 °C agree with T90 within the combined 1σ uncertainties. |
