| Zugriffsnummer | 46076 |
| Dokumenttyp | Zeitschriftenartikel |
| Peer Review | unbekannt |
| Sprache | Englisch |
| Titel | UHF-resistive SQUID noise thermometer at temperatures between 0.005 and 4.2K |
| Autor(in); Institution |
Hoffmann, A.; 9.31, Tieftemperaturmesstechnik, PTB-Berlin
Buchholz, Bernhard; PTB-Berlin
|
| Quelle/Jahr | Journal of Physics E: 17 (1984), 11, 1035 - 1037 |
| ISSN | 0022-3735 |
| DOI | |
| Verlag | London: IOP |
| Zusammenfassung | The RF SQUID noise thermometer is a convenient instrument to directly measure thermodynamic temperatures below 4.2K. However, as the uncertainty is statistically related to the number of frequency counts, it requires long measurement times. The authors describe a thermometer in which the time for one frequency measurement is reduced by using a 320 MHz-SQUID to improve the signal-to- noise ratio; making period measurements to avoid the round off errors; and using a fast computer to keep the processing time for a single measurement below 2 ms. The direct reading resolution of the noise thermometer is 1% for a total measuring time of 1 min, or less in longer time intervals. This time can be further reduced for relative temperature measurements by utilising the simultaneously available noise resistance information. |
