Searched for: author:"Parnell, S."
(1 - 9 of 9)
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Dadisman, Ryan (author), Shen, Jiazhou (author), Feng, Hao (author), Crow, Lowell (author), Jiang, Chenyang (author), Wang, Tianhao (author), Zhang, Yuxuan (author), Bilheux, Hassina (author), Parnell, S. (author), More Authors (author)
Several methods of polarized neutron scattering call for a zero magnetic field (ZF) region to reduce magnetic field integral aberrations while preserving the neutron polarization. Though the design for large angle neutron scattering has been presented in various places, the design characterization and tuning has not been discussed before. In...
journal article 2019
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Li, Fankang (author), Parnell, S. (author), Dalgliesh, Robert M. (author), Washington, Adam (author), Plomp, J. (author), Pynn, Roger (author)
To investigate long length scale structures using neutron scattering, real space techniques have shown certain advantages over the conventional methods working in reciprocal space. As one of the real space measurement techniques, spin echo modulated small angle neutron scattering (SEMSANS) has attracted attention, due to its relaxed...
journal article 2019
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Burg, Stephanie L. (author), Washington, Adam (author), Coles, David M. (author), Bianco, Antonino (author), McLoughlin, Daragh (author), Mykhaylyk, Oleksandr O. (author), Villanova, Julie (author), Dennison, Andrew J.C. (author), Parnell, S. (author), More Authors (author)
Cyphochilus beetle scales are amongst the brightest structural whites in nature, being highly opacifying whilst extremely thin. However, the formation mechanism for the voided intra-scale structure is unknown. Here we report 3D x-ray nanotomography data for the voided chitin networks of intact white scales of Cyphochilus and Lepidiota stigma....
journal article 2019
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Li, Fankang (author), Shen, Jiazhou (author), Parnell, S. (author), Thaler, Alex N. (author), Matsuda, Masaaki (author), Keller, Thomas (author), Delaire, Olivier (author), Pynn, Roger (author), Fernandez-Baca, Jaime A. (author)
The energy resolution of the conventional way of measuring a small change in a phonon dispersion curve using neutron scattering is restricted by the relatively coarse intrinsic resolution ellipsoid of the neutron triple-axis spectrometer (TAS). By implementing inelastic neutron spin echo on the host TAS using the Larmor precession of the...
journal article 2019
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Parnell, S. (author), Dalgliesh, R. M. (author), Steinke, N. J. (author), Plomp, J. (author), van Well, A.A. (author)
RF coils have been routinely used for Larmor labelling on the Offspec instrument at ISIS. These coils encode directional information via the neutron polarization using a series of parallelogram-shaped pole shoes which can be tuned to different angles with an RF gradient flipper in the centre of each magnet. We report on measurements of the...
journal article 2018
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Li, Fankang (author), Feng, Hao (author), Parnell, S. (author), Crow, Lowell (author), Matsuda, Masaaki (author), Ye, Feng (author), Kimura, Tsuyoshi (author), Fernandez-Baca, Jaime (author), Pynn, Roger (author), Thaler, Alexander N. (author)
journal article 2018
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Li, Fankang (author), Feng, Hao (author), Thaler, Alexander N. (author), Parnell, S. (author), Hamilton, William A. (author), Crow, Lowell (author), Yang, Wencao (author), Jones, Amy B. (author), Bai, Hongyu (author), Matsuda, Masaaki (author), Baxter, David V. (author), Keller, Thomas (author), Fernandez-Baca, Jaime A. (author), Pynn, Roger (author)
The neutron Larmor diffraction technique has been implemented using superconducting magnetic Wollaston prisms in both single-arm and double-arm configurations. Successful measurements of the coefficient of thermal expansion of a single-crystal copper sample demonstrates that the method works as expected. The experiment involves a new method of...
journal article 2017
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Gaspar, Hugo (author), Teixeira, Paulo (author), Santos, Raquel (author), Fernandes, Liliana (author), Hilliou, Loic (author), Weir, Michael P. (author), Parnell, Andrew J. (author), Abrams, Kerry J. (author), Hill, Christopher J. (author), Bouwman, W.G. (author), Parnell, S. (author), King, Stephen M. (author), Clarke, Nigel (author), Covas, Jose A. (author), Bernardo, Gabriel (author)
We investigated the effect of the feeding formulation (premixed powders of pure components versus solvent-blended mixture) of polystyrene–C60 composites on the dispersion and reagglomeration phenomena developing along the barrel of a twin-screw extruder. The dispersion of C60 in the PS matrix is studied over different length scales using a...
journal article 2017
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Parnell, S. (author), Washington, A.L. (author), Parnell, A.J. (author), Walsh, A (author), Dalgliesh, RM (author), Li, F (author), Hamilton, W.A. (author), Prevost, S (author), fairclough, J.P.A. (author), Pynn, R (author)
Stöber silica particles are used in a diverse range of applications. Despite their widespread industrial and scientific uses, information on the internal structure of the particles is non-trivial to obtain and is not often reported. In this work we have used spin-echo small angle neutron scattering (SESANS) in conjunction with ultra small angle...
journal article 2016
Searched for: author:"Parnell, S."
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