Three dimensional polarimetric neutron tomography-beyond the phase-wrapping limit

Morten Sales*, Takenao Shinohara, Michael Korning Sørensen, Erik B. Knudsen, Anton Tremsin, Markus Strobl, Søren Schmidt

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

Three dimensional polarimetric neutron tomography is an emerging method for non-destructive investigation of magnetic field strength and direction distribution in three dimensions. It utilises the Larmor precession of the neutron spin in the presence of an external magnetic field and has so far been restricted to the measurement of magnetic fields weak enough to keep the neutron precession below the phase-wrapping limit at 180º. Through the use of polychromatic time-of-flight information in combination with an iterative forward model reconstruction algorithm we have gone beyond this limit, thereby vastly broadening the potential of the technique. We present the reconstructed magnetic field of a measured current carrying solenoid as a proof-of-principle for this novel method, as well as successfully applying the method to a simulated data set of a sample consisting of multiple magnetic domains.
Original languageEnglish
Article number205001
JournalJournal of physics d-applied physics
Volume52
Issue number20
Number of pages6
ISSN0022-3727
DOIs
Publication statusPublished - 2019

Keywords

  • neutron imaging
  • neutron tomography
  • neutron polarimetry
  • magnetic fields

Cite this

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title = "Three dimensional polarimetric neutron tomography-beyond the phase-wrapping limit",
abstract = "Three dimensional polarimetric neutron tomography is an emerging method for non-destructive investigation of magnetic field strength and direction distribution in three dimensions. It utilises the Larmor precession of the neutron spin in the presence of an external magnetic field and has so far been restricted to the measurement of magnetic fields weak enough to keep the neutron precession below the phase-wrapping limit at 180º. Through the use of polychromatic time-of-flight information in combination with an iterative forward model reconstruction algorithm we have gone beyond this limit, thereby vastly broadening the potential of the technique. We present the reconstructed magnetic field of a measured current carrying solenoid as a proof-of-principle for this novel method, as well as successfully applying the method to a simulated data set of a sample consisting of multiple magnetic domains.",
keywords = "neutron imaging, neutron tomography, neutron polarimetry, magnetic fields",
author = "Morten Sales and Takenao Shinohara and S{\o}rensen, {Michael Korning} and Knudsen, {Erik B.} and Anton Tremsin and Markus Strobl and S{\o}ren Schmidt",
year = "2019",
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language = "English",
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journal = "Journal of Physics D: Applied Physics",
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Three dimensional polarimetric neutron tomography-beyond the phase-wrapping limit. / Sales, Morten; Shinohara, Takenao; Sørensen, Michael Korning; Knudsen, Erik B.; Tremsin, Anton; Strobl, Markus; Schmidt, Søren.

In: Journal of physics d-applied physics, Vol. 52, No. 20, 205001, 2019.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Three dimensional polarimetric neutron tomography-beyond the phase-wrapping limit

AU - Sales, Morten

AU - Shinohara, Takenao

AU - Sørensen, Michael Korning

AU - Knudsen, Erik B.

AU - Tremsin, Anton

AU - Strobl, Markus

AU - Schmidt, Søren

PY - 2019

Y1 - 2019

N2 - Three dimensional polarimetric neutron tomography is an emerging method for non-destructive investigation of magnetic field strength and direction distribution in three dimensions. It utilises the Larmor precession of the neutron spin in the presence of an external magnetic field and has so far been restricted to the measurement of magnetic fields weak enough to keep the neutron precession below the phase-wrapping limit at 180º. Through the use of polychromatic time-of-flight information in combination with an iterative forward model reconstruction algorithm we have gone beyond this limit, thereby vastly broadening the potential of the technique. We present the reconstructed magnetic field of a measured current carrying solenoid as a proof-of-principle for this novel method, as well as successfully applying the method to a simulated data set of a sample consisting of multiple magnetic domains.

AB - Three dimensional polarimetric neutron tomography is an emerging method for non-destructive investigation of magnetic field strength and direction distribution in three dimensions. It utilises the Larmor precession of the neutron spin in the presence of an external magnetic field and has so far been restricted to the measurement of magnetic fields weak enough to keep the neutron precession below the phase-wrapping limit at 180º. Through the use of polychromatic time-of-flight information in combination with an iterative forward model reconstruction algorithm we have gone beyond this limit, thereby vastly broadening the potential of the technique. We present the reconstructed magnetic field of a measured current carrying solenoid as a proof-of-principle for this novel method, as well as successfully applying the method to a simulated data set of a sample consisting of multiple magnetic domains.

KW - neutron imaging

KW - neutron tomography

KW - neutron polarimetry

KW - magnetic fields

U2 - 10.1088/1361-6463/ab0aba

DO - 10.1088/1361-6463/ab0aba

M3 - Journal article

VL - 52

JO - Journal of Physics D: Applied Physics

JF - Journal of Physics D: Applied Physics

SN - 0022-3727

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ER -