Abstract
The first phase of the EU collaborative project on sub-kelvin thermometry, 'ULT Dissemination', is nearing completion, leading to the development of several thermometers and devices, and the instrumentation needed to disseminate the new Provisional Low Temperature Scale, PLTS-2000, to users. Principal among these are a current-sensing noise thermometer (CSNT), a CMN thermometer adapted for industrial use, a Coulomb blockade thermometer, a second-sound acoustic thermometer and a superconductive reference device SRD-1000. Several partners have set up He-3 melting-pressure thermometers to realise the PLTS-2000, and will check it using Pt-NMR, CMN and other thermometers. The scale, which was formally adopted by the Comite International des Poids et Mesures in October 2000, covers the range of temperature from 1 K down to 0.9 mK, and is defined by an equation for the melting pressure of He-3. The SRD employs novel fabrication and detection techniques with up to 10 samples, and is expected to meet the requirement for fixed points below 1 K, formerly filled by the NIST SRM 767 and 768. Other devices included in the project are ruthenium oxide sensors and a self-contained He-3 melting pressure thermometer. This paper reviews the project progress to date and indicates the potential for research, metrological and industrial application of the devices developed.
Original language | English |
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Title of host publication | TEMPERATURE: ITS MEASUREMENT AND CONTROL IN SCIENCE AND INDUSTRY |
Editors | DC Ripple |
Place of Publication | New York |
Publisher | American Institute of Physics |
Pages | 89-94 |
Number of pages | 6 |
ISBN (Print) | 0-7354-0153-5 |
Publication status | Published - 2003 |
MoE publication type | A4 Conference publication |
Event | International Temperature Symposium - Chicago, United States Duration: 21 Oct 2002 → 24 Oct 2002 Conference number: 8 |
Publication series
Name | AIP CONFERENCE PROCEEDINGS |
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Publisher | American Institute of Physics |
Volume | 684 |
ISSN (Print) | 0094-243X |
Conference
Conference | International Temperature Symposium |
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Country/Territory | United States |
City | Chicago |
Period | 21/10/2002 → 24/10/2002 |