1333 lines
92 KiB
Text
1333 lines
92 KiB
Text
<!DOCTYPE html>
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<html lang="en" dir="ltr" prefix="content: http://purl.org/rss/1.0/modules/content/ dc: http://purl.org/dc/terms/ foaf: http://xmlns.com/foaf/0.1/ og: http://ogp.me/ns# rdfs: http://www.w3.org/2000/01/rdf-schema# schema: http://schema.org/ sioc: http://rdfs.org/sioc/ns# sioct: http://rdfs.org/sioc/types# skos: http://www.w3.org/2004/02/skos/core# xsd: http://www.w3.org/2001/XMLSchema# ">
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<head>
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<div class="entity-reference"> <a href="/news-events/news/2025/01/new-atom-based-thermometer-measures-temperature-more-accurately" hreflang="en"><img loading="lazy" src="/sites/default/files/styles/thumbnail/public/images/2025/01/16/3d_mot_color.jpg?itok=b2ZwUW_j" width="75" height="100" alt="View through a circular opening into a dark interior. A red dot floats in the darkness. " typeof="foaf:Image" />
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<h3 class="nist-teaser__title"><a href="/news-events/news/2025/01/new-atom-based-thermometer-measures-temperature-more-accurately"><span property="schema:name">New Atom-Based Thermometer Measures Temperature More Accurately</span>
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<div class="daterange"><time datetime="2025-01-23T12:00:00Z">January 23, 2025</time>
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<div class="nist-teaser__content">
|
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<div property="schema:text" class="text-with-summary"> This atomic thermometer provides accurate measurements “out of the box” because it relies on the basic principles of quantum physics.
|
||
|
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|
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<div class="entity-reference"> <a href="/news-events/news/2024/01/microwave-detectors-and-multiplexing-nist-researchers-help-astronomers" hreflang="en"><img loading="lazy" src="/sites/default/files/styles/thumbnail/public/images/2024/01/24/SO-UHF2-array.jpg?itok=hRDL5rAU" width="100" height="54" alt="single microwave SQUID multiplexer chip" typeof="foaf:Image" />
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<h3 class="nist-teaser__title"><a href="/news-events/news/2024/01/microwave-detectors-and-multiplexing-nist-researchers-help-astronomers"><span property="schema:name">Microwave Detectors and Multiplexing: NIST Researchers Help Astronomers Examine the Early Universe</span>
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<div class="daterange"><time datetime="2024-01-24T12:00:00Z">January 24, 2024</time>
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|
||
<div property="schema:text" class="text-with-summary"> Perched atop a high plateau in Chile’s Atacama Desert, a long-awaited observatory is beginning to take shape: the largest suite of ground-based telescopes
|
||
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</div>
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<article
|
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about="/news-events/news/2023/09/working-their-thermal-magic-digging-details-ambitious-new-thermometry" typeof="schema:Article" class="nist-teaser"
|
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>
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<div class="entity-reference"> <a href="/news-events/news/2023/09/working-their-thermal-magic-digging-details-ambitious-new-thermometry" hreflang="en"><img loading="lazy" src="/sites/default/files/styles/thumbnail/public/images/2023/09/25/DSC_1801.png?itok=0C4CBhlM" width="67" height="100" alt="Thinh Bui with the Thermal MagIC system" typeof="foaf:Image" />
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<h3 class="nist-teaser__title"><a href="/news-events/news/2023/09/working-their-thermal-magic-digging-details-ambitious-new-thermometry"><span property="schema:name">Working Their Thermal MagIC: Digging Into the Details of an Ambitious New ‘Thermometry Camera’</span>
|
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|
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|
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<div class="daterange"><time datetime="2023-09-26T12:00:00Z">September 26, 2023</time>
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|
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|
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|
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|
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<div class="nist-teaser__content">
|
||
<div property="schema:text" class="text-with-summary"> Thermometers can do a lot of things: measure the temperature at the center of your perfectly braised chicken or tell you whether to keep your child home from
|
||
|
||
</div>
|
||
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about="/programs-projects/deployable-doppler-thermometry" class="nist-teaser"
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|
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<div class="text-with-summary"> Accurate temperature measurements are essential to many industrial processes, including petrochemical or pharmaceutical production and nuclear power generation. Typical process control thermometers, such as resistance temperature detectors, are known to drift over time and degrade when subject to
|
||
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|
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|
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about="/programs-projects/atomic-thermometers" class="nist-teaser"
|
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|
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<div class="entity-reference"> <a href="/programs-projects/atomic-thermometers" hreflang="en"><img loading="lazy" src="/sites/default/files/styles/thumbnail/public/images/2025/02/26/cat-experiment.png?itok=xhboJoRf" width="100" height="31" alt="cold atom thermometer (CAT) experiment" typeof="foaf:Image" />
|
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|
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<h3 class="nist-teaser__title"><a href="/programs-projects/atomic-thermometers"><span>Atomic Thermometers</span>
|
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|
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|
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<div class="nist-badge display-inline-block margin-y-1 nist-badge--blue boolean">Ongoing</div>
|
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|
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</div>
|
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|
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</header>
|
||
<div class="nist-teaser__content">
|
||
<div class="text-with-summary"> Approach 1 Compact Blackbody Radiation Atomic Sensor (CoBRAS) The Compact Blackbody Radiation Atomic Sensor (CoBRAS) uses a thermal vapor of atoms excited by a single laser to detect BBR. From the optically excited state, atomic population is transferred to other, nearby excited states by a
|
||
|
||
</div>
|
||
|
||
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|
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|
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|
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|
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<article
|
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about="/programs-projects/platform-realizing-integrated-molecule-experiments-prime" class="nist-teaser"
|
||
>
|
||
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|
||
<div class="entity-reference"> <a href="/programs-projects/platform-realizing-integrated-molecule-experiments-prime" hreflang="en"><img loading="lazy" src="/sites/default/files/styles/thumbnail/public/images/2020/08/19/prime.png?itok=R55V4xKC" width="100" height="39" alt="Platform for Realizing Integrated Molecule Experiments" typeof="foaf:Image" />
|
||
|
||
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|
||
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|
||
|
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|
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|
||
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|
||
<h3 class="nist-teaser__title"><a href="/programs-projects/platform-realizing-integrated-molecule-experiments-prime"><span>Platform for Realizing Integrated Molecule Experiments (PRIME)</span>
|
||
</a></h3>
|
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|
||
<div class="nist-badge display-inline-block margin-y-1 nist-badge--blue boolean">Ongoing</div>
|
||
|
||
</div>
|
||
|
||
</header>
|
||
<div class="nist-teaser__content">
|
||
<div class="text-with-summary"> Blackbodies realize a clear relationship between radiated power and temperature through Planck’s law. While a reliable instrument for temperature and power calibrations, blackbodies are afflicted with a plethora of systematics (e.g., non-ideal emissivity, propagation loss, temperature gradients
|
||
|
||
</div>
|
||
|
||
</div>
|
||
</div>
|
||
</article>
|
||
</div>
|
||
<div>
|
||
<article
|
||
about="/programs-projects/acoustic-thermometry" class="nist-teaser"
|
||
>
|
||
<div class="nist-teaser__image">
|
||
<div class="entity-reference"> <a href="/programs-projects/acoustic-thermometry" hreflang="en"><img loading="lazy" src="/sites/default/files/styles/thumbnail/public/images/pml/div685/grp01/nistacousticthermometer.jpg?itok=XUTXb5Zr" width="59" height="100" alt="Acoustic Thermometer" typeof="foaf:Image" />
|
||
|
||
</a>
|
||
</div>
|
||
|
||
</div>
|
||
<div class="nist-teaser__content-wrapper">
|
||
<header>
|
||
<h3 class="nist-teaser__title"><a href="/programs-projects/acoustic-thermometry"><span>Acoustic Thermometry</span>
|
||
</a></h3>
|
||
<div class="nist-teaser__type">
|
||
<div class="nist-badge display-inline-block margin-y-1 nist-badge--green boolean">Completed</div>
|
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|
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</div>
|
||
|
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</header>
|
||
<div class="nist-teaser__content">
|
||
<div class="text-with-summary"> Data from the NIST acoustic thermometer will form an improved basis for the equations used with platinum resistance thermometry, which is the primary mechanism to disseminate accurate temperature standards. Objective: To obtain measurements of thermodynamic temperature in the range between 273 K and
|
||
|
||
</div>
|
||
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|
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about="/publications/traceable-comparisons-water-triple-point-cells" class="nist-teaser"
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|
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<header>
|
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<h3 class="nist-teaser__title"><a href="/publications/traceable-comparisons-water-triple-point-cells"><span>Traceable Comparisons of Water-Triple-Point Cells</span>
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</a></h3>
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<div class="nist-teaser__date">
|
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<div class="daterange"><time datetime="2024-11-08T12:00:00Z">November 8, 2024</time>
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</div>
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<div class="nist-teaser__type">
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<div class="nist-field nist-field--label-inline text-long">
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<div class="nist-field__label">Author(s)</div>
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<div class="nist-field__item"><span class="nist-author">Weston L. Tew</span></div>
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</div>
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</div>
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</header>
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<div class="nist-teaser__content">
|
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<div class="text-with-summary"> A specific sub-set of comparison data is presented for two NIST water-triple-point cells that provide traceability to the results of the 2023 Consultative
|
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|
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</div>
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about="/publications/rapid-response-optical-rigt-and-relative-determination-t-t90-across-293-t-433-k" class="nist-teaser"
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>
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<div class="nist-teaser__content-wrapper">
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<header>
|
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<h3 class="nist-teaser__title"><a href="/publications/rapid-response-optical-rigt-and-relative-determination-t-t90-across-293-t-433-k"><span>Rapid response optical RIGT, and relative determination of T - T_90 across (293</span>
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</a></h3>
|
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<div class="nist-teaser__date">
|
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<div class="daterange"><time datetime="2024-10-18T12:00:00Z">October 18, 2024</time>
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</div>
|
||
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</div>
|
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<div class="nist-teaser__type">
|
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<div class="nist-field nist-field--label-inline text-long">
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<div class="nist-field__label">Author(s)</div>
|
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<div class="nist-field__item"><span class="nist-author">Patrick Egan</span></div>
|
||
</div>
|
||
|
||
</div>
|
||
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||
</header>
|
||
<div class="nist-teaser__content">
|
||
<div class="text-with-summary"> A refractive-index gas thermometer has been used to determine T − T90 in the temperature range (293 T 433) K within about 3 µK/K relative standard uncertainty
|
||
|
||
</div>
|
||
|
||
</div>
|
||
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</article>
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||
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<article
|
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about="/publications/optical-np-t90-measurement-suite-3-results-l-1542-nm" class="nist-teaser"
|
||
>
|
||
<div class="nist-teaser__content-wrapper">
|
||
<header>
|
||
<h3 class="nist-teaser__title"><a href="/publications/optical-np-t90-measurement-suite-3-results-l-1542-nm"><span>Optical n(p, T_90) measurement suite 3: results at λ = 1542 nm</span>
|
||
</a></h3>
|
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<div class="nist-teaser__date">
|
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<div class="daterange"><time datetime="2024-08-03T12:00:00Z">August 3, 2024</time>
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</div>
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<div class="nist-teaser__type">
|
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<div class="nist-field nist-field--label-inline text-long">
|
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<div class="nist-field__label">Author(s)</div>
|
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<div class="nist-field__item"><span class="nist-author">Patrick Egan</span>, Yuanchao Yang</div>
|
||
</div>
|
||
|
||
</div>
|
||
|
||
</header>
|
||
<div class="nist-teaser__content">
|
||
<div class="text-with-summary"> Single-isotherm n(p, T90) results are reported for the gases Ar, N2, H2O, and D2O at vacuum wavelength λ = 1542.383(1) nm. The argon and nitrogen isotherms were
|
||
|
||
</div>
|
||
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<article
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about="/publications/optical-np-t90-measurement-suite-2-h2o-and-d2o" class="nist-teaser"
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<div class="nist-teaser__content-wrapper">
|
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<header>
|
||
<h3 class="nist-teaser__title"><a href="/publications/optical-np-t90-measurement-suite-2-h2o-and-d2o"><span>Optical n(p, T_90) measurement suite 2: H_2O and D_2O</span>
|
||
</a></h3>
|
||
<div class="nist-teaser__date">
|
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<div class="daterange"><time datetime="2024-05-28T12:00:00Z">May 28, 2024</time>
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<div class="nist-teaser__type">
|
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<div class="nist-field nist-field--label-inline text-long">
|
||
<div class="nist-field__label">Author(s)</div>
|
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<div class="nist-field__item"><span class="nist-author">Patrick Egan</span>, Yuanchao Yang</div>
|
||
</div>
|
||
|
||
</div>
|
||
|
||
</header>
|
||
<div class="nist-teaser__content">
|
||
<div class="text-with-summary"> A suite of measurements of refractive index n(p, T_90) is reported for gas phase ordinary water H_2O and heavy water D_2O. The methodology is optical refractive
|
||
|
||
</div>
|
||
|
||
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|
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|
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|
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about="/laboratories/tools-instruments/apparatus-measurement-high-temperature-thermoelectric-transport" class="nist-teaser"
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<h3 class="nist-teaser__title"><a href="/laboratories/tools-instruments/apparatus-measurement-high-temperature-thermoelectric-transport"><span>Apparatus for the Measurement of High Temperature Thermoelectric Transport Properties</span>
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<div class="nist-teaser__content">
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<div class="text-with-summary"> Description The Seebeck coefficient is a widely measured transport property that provides fundamental information on charge carrier transport and the electronic
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