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DOE OSTI · 2406768

Spin echo small-angle neutron scattering using superconducting magnetic Wollaston prisms

Funama, Fumiaki·Wolf, Caitlyn M.·Weigandt, Katie·Shen, Jiazhou·Parnell, Steven R.·Li, Fankang
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Abstract

Here, we show the implementation of superconducting magnetic Wollaston prisms for spin echo small-angle neutron scattering. Two calibration methods for the spin echo length are presented: one utilizing spin echo modulated small-angle neutron scattering and the other based on the neutron refraction by quartz wedge crystals. Our experimental results with polystyrene nano-particle colloids showcase the system’s efficacy in measuring both dilute and concentrated colloidal systems. Additionally, investigations into the pore diameter and pitch of a nano-porous alumina membrane demonstrate its capability in analyzing nano-porous materials. Furthermore, we discuss potential optimizations to further extend the accessible spin echo length.

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47 OTHER INSTRUMENTATIONLarmor precessionMagnetic devicesNanoparticleNeutron scatteringNeutron spin-echoSuperconducting devices

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Funama, Fumiaki, Wolf, Caitlyn M., Weigandt, Katie, Shen, Jiazhou, Parnell, Steven R., Li, Fankang. 2024-07-17. Spin echo small-angle neutron scattering using superconducting magnetic Wollaston prisms. https://doi.org/10.1063/5.0217884

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