| Zugriffsnummer | 22344 |
| Dokumenttyp | Konferenzartikel in Zeitschrift |
| Peer Review | unbekannt |
| Sprache | Englisch |
| Titel | Practical noise thermometers for low temperatures |
| Autor(in); Institution |
Engert, Jost; 7.4, Temperatur, PTB-Berlin
Beyer, Jörn; 7.5, Tieftemperaturthermodynamik und -technologie, PTB-Berlin
Drung, Dietmar; 7.5, Tieftemperaturthermodynamik und -technologie, PTB-Berlin
Kirste, Alexander; 7.5, Tieftemperaturthermodynamik und -technologie, PTB-Berlin
Heyer, Dieter; 7.4, Temperatur, PTB-Berlin
Fleischmann, Andreas; Kirchhoff-Institut für Physik, Universität Heidelberg, Heidelberg, GERMANY
Enss, Christian; Kirchhoff-Institut für Physik, Universität Heidelberg, Heidelberg, GERMANY
Barthelmess, H.-J.; Magnicon GbR, Hamburg, GERMANY
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| Quelle/Jahr | Journal of Physics: Conference series: 150 (2009), 4 S. |
| Artikelnummer | 012012 |
| ISSN | 1742-6588 (PRINT) ; 1742-6596 (ONLINE) |
| DOI | |
| URL | |
| Verlag | Bristol: IOP Publ. |
| Konferenzangaben | 25th International Conference on Low Temperature Physics (LT25), Amsterdam, 08-13, August, 2008, The Netherlands |
| Zusammenfassung | We have developed SQUID-based noise thermometers which cover the temperature range from 4 K to below 10 mK. The working principle is based on the detection of thermal magnetic flux noise generated by noise currents which are caused by the thermally activated motion of electric charges in a metallic temperature sensor. The noise thermometers exhibit a linear characteristic via the Nyquist relation, are fast, compact, and easy to use. The Magnetic Field Fluctuation Thermometer (MFFT) and the Current Sensing Noise Thermometer (CSNT) we will present can be designed to meet different requirements concerning speed and accuracy of the temperature measurement. In both variants the temperature sensor and the SQUID are located at the same temperature level. Experimental results will be given for linearity, speed, and accuracy of the noise thermometers as well as for comparison measurements with a high accuracy realisation of the PLTS-2000. Commercial versions of the MFFT and the CSNT including the temperature sensor, the SQUID, and all necessary electronics are available through the company MAGNICON. For the temperature determination the noise signals are digitized by a 16 Bit ADC and analyzed by a LabVIEW control software. |
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