AustralieFrV1, Main, Exploration, bibRecord, 009C72

Recent advances in polarised 3He spin filters at the ILL

Identifieur interne : 009C72 ( Main/Exploration ); précédent : 009C71; suivant : 009C73

Recent advances in polarised 3He spin filters at the ILL

Auteurs : A. K. Petoukhov [France] ; K. H. Andersen [France] ; D. Jullien [France] ; E. Babcock [France] ; J. Chastagnier [France] ; R. Chung [France] ; H. Humblot [France] ; E. Lelievre-Berna [France] ; F. Tasset [France] ; F. Radu [Allemagne] ; M. Wolff [Allemagne] ; H. Zabel [Allemagne]

Source :

Physica. B, Condensed matter [ 0921-4526 ] ; 2006.

RBID : Pascal:07-0217107

Descripteurs français

Pascal (Inist)
- Filtre spin, Neutron polarisé, Réflectométrie, Polarisation, Epaisseur, Performance, Réflexion neutron, Diffusion neutron, 2820C.

English descriptors

KwdEn :
- Neutron diffusion, Neutron reflection, Performance, Polarization, Polarized neutron, Reflectometry, Spin filter, Thickness.

Abstract

We report the present status and recent advances made in polarised-³He spin-filters at the ILL. The Tyrex filling station is working reliably and producing polarised ³He for neutron spin filters on a daily basis. The latest spin-filter cells have wall relaxation times between 200 and 400 h - the longest relaxation times yet achieved for valve-sealed cells. Recent results using ³He spin filters for reflectometry are presented and compared to the presently used supermirror-based polarisation analysers. By increasing the optical thickness of ³He gas, we move into a regime in which the neutron beam polarisation decays with a time constant of the order of a thousand hours and is thus negligible within the 24 h time scale of an experiment. We present the performance of a ³He spin flipper, which inverts the polarisation direction of the ³He nuclei by adiabatic fast passage with a polarisation loss of 10^-5 per flip. The development of in situ filling of the spin-filter cell via a capillary is described. This "local filling" technique enables ³He spin filters to be used in inaccessible regions, such as inside large-detector vacuum tanks and in high-radiation environments.

Affiliations:

Links toward previous steps (curation, corpus...)

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Le document en format XML

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He spin filters at the ILL</title>
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Recent advances in polarised <sup>3</sup>
He spin filters at the ILL</title>
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<sZ>5 aut.</sZ>
<sZ>6 aut.</sZ>
<sZ>7 aut.</sZ>
<sZ>8 aut.</sZ>
<sZ>9 aut.</sZ>
</inist:fA14>
<country>France</country>
<placeName><region type="region" nuts="2">Auvergne-Rhône-Alpes</region>
<region type="old region" nuts="2">Rhône-Alpes</region>
<settlement type="city">Grenoble</settlement>
</placeName>
</affiliation>
</author>
<author><name sortKey="Radu, F" sort="Radu, F" uniqKey="Radu F" first="F." last="Radu">F. Radu</name>
<affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Institut für Experimentalphysik /Festkörperphysik, Ruhr-Universität Bochum</s1>
<s2>44780 Bochum</s2>
<s3>DEU</s3>
<sZ>10 aut.</sZ>
<sZ>11 aut.</sZ>
<sZ>12 aut.</sZ>
</inist:fA14>
<country>Allemagne</country>
<wicri:noRegion>44780 Bochum</wicri:noRegion>
<wicri:noRegion>Ruhr-Universität Bochum</wicri:noRegion>
<wicri:noRegion>44780 Bochum</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Wolff, M" sort="Wolff, M" uniqKey="Wolff M" first="M." last="Wolff">M. Wolff</name>
<affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Institut für Experimentalphysik /Festkörperphysik, Ruhr-Universität Bochum</s1>
<s2>44780 Bochum</s2>
<s3>DEU</s3>
<sZ>10 aut.</sZ>
<sZ>11 aut.</sZ>
<sZ>12 aut.</sZ>
</inist:fA14>
<country>Allemagne</country>
<wicri:noRegion>44780 Bochum</wicri:noRegion>
<wicri:noRegion>Ruhr-Universität Bochum</wicri:noRegion>
<wicri:noRegion>44780 Bochum</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Zabel, H" sort="Zabel, H" uniqKey="Zabel H" first="H." last="Zabel">H. Zabel</name>
<affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Institut für Experimentalphysik /Festkörperphysik, Ruhr-Universität Bochum</s1>
<s2>44780 Bochum</s2>
<s3>DEU</s3>
<sZ>10 aut.</sZ>
<sZ>11 aut.</sZ>
<sZ>12 aut.</sZ>
</inist:fA14>
<country>Allemagne</country>
<wicri:noRegion>44780 Bochum</wicri:noRegion>
<wicri:noRegion>Ruhr-Universität Bochum</wicri:noRegion>
<wicri:noRegion>44780 Bochum</wicri:noRegion>
</affiliation>
</author>
</analytic>
<series><title level="j" type="main">Physica. B, Condensed matter</title>
<title level="j" type="abbreviated">Physica, B Condens. matter</title>
<idno type="ISSN">0921-4526</idno>
<imprint><date when="2006">2006</date>
</imprint>
</series>
</biblStruct>
</sourceDesc>
<seriesStmt><title level="j" type="main">Physica. B, Condensed matter</title>
<title level="j" type="abbreviated">Physica, B Condens. matter</title>
<idno type="ISSN">0921-4526</idno>
</seriesStmt>
</fileDesc>
<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Neutron diffusion</term>
<term>Neutron reflection</term>
<term>Performance</term>
<term>Polarization</term>
<term>Polarized neutron</term>
<term>Reflectometry</term>
<term>Spin filter</term>
<term>Thickness</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Filtre spin</term>
<term>Neutron polarisé</term>
<term>Réflectométrie</term>
<term>Polarisation</term>
<term>Epaisseur</term>
<term>Performance</term>
<term>Réflexion neutron</term>
<term>Diffusion neutron</term>
<term>2820C</term>
</keywords>
</textClass>
</profileDesc>
</teiHeader>
<front><div type="abstract" xml:lang="en">We report the present status and recent advances made in polarised-<sup>3</sup>
He spin-filters at the ILL. The Tyrex filling station is working reliably and producing polarised <sup>3</sup>
He for neutron spin filters on a daily basis. The latest spin-filter cells have wall relaxation times between 200 and 400 h - the longest relaxation times yet achieved for valve-sealed cells. Recent results using <sup>3</sup>
He spin filters for reflectometry are presented and compared to the presently used supermirror-based polarisation analysers. By increasing the optical thickness of <sup>3</sup>
He gas, we move into a regime in which the neutron beam polarisation decays with a time constant of the order of a thousand hours and is thus negligible within the 24 h time scale of an experiment. We present the performance of a <sup>3</sup>
He spin flipper, which inverts the polarisation direction of the <sup>3</sup>
He nuclei by adiabatic fast passage with a polarisation loss of 10<sup>-5</sup>
 per flip. The development of in situ filling of the spin-filter cell via a capillary is described. This "local filling" technique enables <sup>3</sup>
He spin filters to be used in inaccessible regions, such as inside large-detector vacuum tanks and in high-radiation environments.</div>
</front>
</TEI>
<affiliations><list><country><li>Allemagne</li>
<li>France</li>
</country>
<region><li>Auvergne-Rhône-Alpes</li>
<li>Rhône-Alpes</li>
</region>
<settlement><li>Grenoble</li>
</settlement>
</list>
<tree><country name="France"><region name="Auvergne-Rhône-Alpes"><name sortKey="Petoukhov, A K" sort="Petoukhov, A K" uniqKey="Petoukhov A" first="A. K." last="Petoukhov">A. K. Petoukhov</name>
</region>
<name sortKey="Andersen, K H" sort="Andersen, K H" uniqKey="Andersen K" first="K. H." last="Andersen">K. H. Andersen</name>
<name sortKey="Babcock, E" sort="Babcock, E" uniqKey="Babcock E" first="E." last="Babcock">E. Babcock</name>
<name sortKey="Chastagnier, J" sort="Chastagnier, J" uniqKey="Chastagnier J" first="J." last="Chastagnier">J. Chastagnier</name>
<name sortKey="Chung, R" sort="Chung, R" uniqKey="Chung R" first="R." last="Chung">R. Chung</name>
<name sortKey="Humblot, H" sort="Humblot, H" uniqKey="Humblot H" first="H." last="Humblot">H. Humblot</name>
<name sortKey="Jullien, D" sort="Jullien, D" uniqKey="Jullien D" first="D." last="Jullien">D. Jullien</name>
<name sortKey="Lelievre Berna, E" sort="Lelievre Berna, E" uniqKey="Lelievre Berna E" first="E." last="Lelievre-Berna">E. Lelievre-Berna</name>
<name sortKey="Tasset, F" sort="Tasset, F" uniqKey="Tasset F" first="F." last="Tasset">F. Tasset</name>
</country>
<country name="Allemagne"><noRegion><name sortKey="Radu, F" sort="Radu, F" uniqKey="Radu F" first="F." last="Radu">F. Radu</name>
</noRegion>
<name sortKey="Wolff, M" sort="Wolff, M" uniqKey="Wolff M" first="M." last="Wolff">M. Wolff</name>
<name sortKey="Zabel, H" sort="Zabel, H" uniqKey="Zabel H" first="H." last="Zabel">H. Zabel</name>
</country>
</tree>
</affiliations>
</record>

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Recent advances in polarised 3He spin filters at the ILL

Recent advances in polarised 3He spin filters at the ILL

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