1034 lines
81 KiB
Text
1034 lines
81 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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<h1 class="nist-page__title">Polarized Beam Reflectometer (PBR)</h1>
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<img alt="PBR beamline" height="234" loading="lazy" src="/sites/default/files/images/2018/10/04/pbr.png" typeof="foaf:Image" width="995">
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|
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</div>
|
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<figcaption class="nist-image__caption"></figcaption>
|
||
</figure>
|
||
|
||
|
||
|
||
<p>This cold neutron instrument is used to study materials of interest in surface and interfacial science, including magnetic multilayers, polymer films, and artificial biological membranes. PBR is most commonly used for specular neutron reflectometry, a technique sensitive to the depth profiles of the nuclear composition and the vector magnetization in thin films and multilayers. For magnetic samples, the option to use a spin polarized neutron beam allows for clear distinction between magnetic and structural contributions to the scattering. For non-magnetic samples deposited on a ferromagnetic reference layer, non-invasive contrast variation can be achieved by switching the spin state of the polarized beam - a technique that can enhance sensitivity to the compositional profile. Cryostats, magnets, and liquid cells are available for control of sample environment. <strong>Excellent beam polarization in magnetic fields up to 3 T is possible using a dedicated cryogen-free superconducting magnet</strong>. On-site <a href="https://www.nist.gov/laboratories/tools-instruments/x-ray-reflectometer">x-ray reflectometry</a> is available for additional sample characterization. If you are interested in performing an experiment, <a href="https://www.nist.gov/ncnr/obtaining-instrument-time">apply for beamtime</a>, or contact one of the instrument scientists directly. <a href="https://www.nist.gov/ncnr/arrange-visit-ncnr/financial-assistance">Monetary assistance</a> may be available for new facility users.</p>
|
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|
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<figure class=" align-center nist-image" role="group">
|
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<div data-link="https://www.ncnr.nist.gov/instruments/pbr/references/pnrchapti.pdf">
|
||
|
||
<a href="https://www.ncnr.nist.gov/instruments/pbr/references/pnrchapti.pdf"><img alt="Scattering Geometry" height="1304" loading="lazy" src="/sites/default/files/images/2018/10/04/fig1p15.png" typeof="foaf:Image" width="1755"></a>
|
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<figcaption class="nist-image__caption"></figcaption>
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</figure>
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<p> </p>
|
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<figure class=" align-center nist-image--lightbox nist-image" role="group">
|
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<div data-lightbox="https://www.nist.gov/sites/default/files/styles/2800_x_2800_limit/public/images/2018/10/05/pbrmagnet.jpg?itok=QKCV-hB4" data-media-id="465541">
|
||
|
||
<img alt="PBR magnet" height="589" loading="lazy" src="/sites/default/files/styles/960_x_960_limit/public/images/2018/10/05/pbrmagnet.jpg?itok=ftN1dQio" typeof="foaf:Image" width="960">
|
||
|
||
|
||
|
||
|
||
|
||
</div>
|
||
<figcaption class="nist-image__caption">PBR sample table with compensated, cryogen-free superconducting magnet. Using a side-mounted cryostat, polarized beam measurements can be performed at temperatures down to 3.5 K, and magnetic fields up to 3 T.</figcaption>
|
||
</figure>
|
||
|
||
|
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|
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<div class="nist-contact__name"><a href="/people/julie-borchers" title="View staff profile page">Julie A. Borchers</a></div>
|
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<a href="mailto:julie.borchers@nist.gov">julie.borchers@nist.gov</a>
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(301) 975-6597
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<div class="nist-contact__name"><a href="/people/charles-f-majkrzak" title="View staff profile page">Charles F. Majkrzak</a></div>
|
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|
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|
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<a href="mailto:charles.majkrzak@nist.gov">charles.majkrzak@nist.gov</a>
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(301) 975-5251
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|
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<div class="nist-field-item nist-date"><a href="https://ncnr.nist.gov/instrumentSchedule/ims_calendar.html?instruments=PBR">PBR Schedule</a></div>
|
||
<div class="nist-field-item nist-date"><a href="https://www.nist.gov/ncnr/schedules/ncnr-schedule">Facility Schedule</a></div>
|
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<a class="usa-button usa-button--primary-lighter" href="https://www.ncnr.nist.gov/ipeek/singleplotwindow.html?instrument=NGD">Live data</a>
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class="nist-block"
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>
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<h2
|
||
class="nist-block__title"
|
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>Instrument Details</h2>
|
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|
||
<div class="link-list">
|
||
<ul>
|
||
<li>
|
||
<a href="https://webster.ncnr.nist.gov/ornl/XNS_2020_NR_CFM_with_AN.mp4">The Chuck Majkrzak Experience</a>
|
||
</li>
|
||
<li>
|
||
<a href="https://www.ncnr.nist.gov/instruments/pbr/references/pnrchapti.pdf">Theory of PNR</a>
|
||
</li>
|
||
<li>
|
||
<a href="https://webster.ncnr.nist.gov/ornl/Narrated_ORNLSummerSchool_Krycka_17June2020.mp4">Neutron Polarization with Kathryn Krycka</a>
|
||
</li>
|
||
<li>
|
||
<a href="https://www.ncnr.nist.gov/instruments/pbr/references/Fitz.pdf">PNR and Magnetic Materials</a>
|
||
</li>
|
||
<li>
|
||
<a href="https://www.nist.gov/ncnr/neutron-instruments/reflectometry">Reflectometry Team</a>
|
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</li>
|
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</ul>
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|
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|
||
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</div>
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<div
|
||
class="nist-block"
|
||
>
|
||
|
||
<h2
|
||
class="nist-block__title"
|
||
>Experiment Planning</h2>
|
||
|
||
<div class="link-list">
|
||
<ul>
|
||
<li>
|
||
<a href="https://www.ncnr.nist.gov/resources/activation/">SLD Calculator</a>
|
||
</li>
|
||
<li>
|
||
<a href="https://ncnr.nist.gov/instruments/magik/Periodic.html">Scatterer's Periodic Table</a>
|
||
</li>
|
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<li>
|
||
<a href="https://www.ncnr.nist.gov/instruments/pbr/beamwidth.html">Beamwidth Calculator</a>
|
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|
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|
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<a href="https://ncnr.nist.gov/instruments/magik/d3-science/reflectometer_alignment_sim.html">Alignment Simulator</a>
|
||
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|
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|
||
<a href="https://pages.nist.gov/reflectometry-calculators/offspec_planner.html">Offspecular Planning Calculator</a>
|
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|
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</ul>
|
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</div>
|
||
|
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|
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</div>
|
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||
class="nist-block"
|
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>
|
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|
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<h2
|
||
class="nist-block__title"
|
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>Research Program</h2>
|
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|
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<div class="nist-field nist-field--label-hidden nist-field--link-list link">
|
||
<div class="nist-field__items">
|
||
<div class="nist-field__item"><a href="https://ncnr.nist.gov/publications/PBR_pubs.html">Publications</a></div>
|
||
<div class="nist-field__item"><a href="https://www.nist.gov/news-events/news/2020/06/mit-nist-create-first-room-temp-magnon-switch-industrially-useful">Room Temperature Magnon Switch</a></div>
|
||
<div class="nist-field__item"><a href="https://aip.scitation.org/doi/10.1063/10.0000173">Tuning Coercivity With Phase Transitions</a></div>
|
||
<div class="nist-field__item"><a href="https://www.nist.gov/news-events/news/2016/10/nist-collaboration-heats-exotic-topological-insulators">Exotic Topological Insulators</a></div>
|
||
<div class="nist-field__item"><a href="https://www.nist.gov/news-events/news/2016/07/nist-reveals-valuable-fundamentals-stacked-cracked-jack-all-trades">Oxygen Migration in Magneto-Ionics</a></div>
|
||
</div>
|
||
</div>
|
||
|
||
|
||
</div>
|
||
|
||
<div
|
||
class="nist-block"
|
||
>
|
||
|
||
<h2
|
||
class="nist-block__title"
|
||
>Data Analysis</h2>
|
||
|
||
<div class="link-list">
|
||
<ul>
|
||
<li>
|
||
<a href="https://www.nist.gov/ncnr/reflectometry-software">Overview</a>
|
||
</li>
|
||
<li>
|
||
<a href="https://ncnr.nist.gov/ncnrdata/view/experiment_browser.html">Experiment Browser</a>
|
||
</li>
|
||
<li>
|
||
<a href="https://reductus.nist.gov">Reflectometry Data Reduction</a>
|
||
</li>
|
||
<li>
|
||
<a href="http://nicedata.ncnr.nist.gov">NICE Clients (inside firewall only)</a>
|
||
</li>
|
||
<li>
|
||
<a href="https://pages.nist.gov/reflectometry-calculators/magnetic-reflectivity-calculator.html">Online Reflectivity Fitter</a>
|
||
</li>
|
||
<li>
|
||
<a href="https://www.nist.gov/ncnr/reflectometry-software">Refl1D Model Fitting</a>
|
||
</li>
|
||
</ul>
|
||
</div>
|
||
|
||
|
||
</div>
|
||
|
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</div>
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</aside>
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<div class="grid-container">
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Created October 4, 2018, Updated September 15, 2021
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