scholarly journals Sensitive neutron transverse polarization analysis using a 3He spin filter

2020 ◽  
Vol 91 (7) ◽  
pp. 073303 ◽  
Author(s):  
Y. -Y. Jau ◽  
W. C. Chen ◽  
T. R. Gentile ◽  
D. S. Hussey
Keyword(s):  
Transverse Polarization ◽  
Polarization Analysis ◽  
Spin Filter

scholarly journals Towards wide-angle neutron polarization analysis with a 3He spin filter for TOPAS and NEAT: Testing magic PASTIS on V20 at HZB

2018 ◽  
Author(s):  
Earl Babcock ◽  
Zahir Salhi ◽  
Ramil Gainov ◽  
Robin Woracek ◽  
Helmut Soltner ◽  
...  
Keyword(s):  
Wide Angle ◽  
Polarization Analysis ◽  
Spin Filter ◽  
Neutron Polarization

scholarly journals Polarization analysis on the LET cold neutron spectrometer using a 3He spin-filter: first results

2019 ◽  
Vol 1316 ◽  
pp. 012007 ◽  
Author(s):  
G Cassella ◽  
J R Stewart ◽  
G M Paternò ◽  
V García Sakai ◽  
M Devonport ◽  
...  
Keyword(s):  
Cold Neutron ◽  
Polarization Analysis ◽  
Spin Filter ◽  
Neutron Spectrometer ◽  
First Results

scholarly journals Recent on-beam tests of wide angle neutron polarization analysis with a 3He spin filter: Magic PASTIS on V20 at HZB

2017 ◽  
Vol 862 ◽  
pp. 012002 ◽  
Author(s):  
E Babcock ◽  
Z Salhi ◽  
R Gainov ◽  
R Woracek ◽  
H Soltner ◽  
...  
Keyword(s):  
Wide Angle ◽  
Polarization Analysis ◽  
Spin Filter ◽  
Neutron Polarization

scholarly journals Discussion on data correction for Polarization Analysis with a3He spin filter analyzer

2017 ◽  
Vol 862 ◽  
pp. 012001
Author(s):  
Earl Babcock ◽  
Zahir Salhi ◽  
Emmanuel Kentzinger ◽  
Stefan Mattauch ◽  
Alexander Ioffe
Keyword(s):  
Polarization Analysis ◽  
Spin Filter ◽  
Data Correction

Scientific Reviews :3He Spin Filter at the Institut Laue-Langevin: Polarization Analysis of Diffuse Scattering

Neutron News ◽  
2006 ◽  
Vol 17 (2) ◽  
pp. 26-29 ◽  
Author(s):  
M. Wolff ◽  
F. Radu ◽  
A. Petoukhov ◽  
H. Humblot ◽  
D. Jullien ◽  
...  
Keyword(s):  
Diffuse Scattering ◽  
Polarization Analysis ◽  
Spin Filter

Polarization analysis for small-angle neutron scattering with a 3He spin filter at a pulsed neutron source

2021 ◽  
Vol 54 (2) ◽  
pp. 548-556
Author(s):  
Takuya Okudaira ◽  
Yuki Ueda ◽  
Kosuke Hiroi ◽  
Ryuhei Motokawa ◽  
Yasuhiro Inamura ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Neutron Source ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Incoherent Scattering ◽  
Polarization Analysis ◽  
Spin Filter ◽  
Scattering Intensity ◽  
Pulsed Neutron ◽  
Pulsed Neutron Source

Neutron polarization analysis (NPA) for small-angle neutron scattering (SANS) experiments using a pulsed neutron source was successfully achieved by applying a 3He spin filter as a spin analyzer for the neutrons scattered from the sample. The cell of the 3He spin filter gives a weak small-angle scattering intensity (background) and covers a sufficient solid angle for performing SANS experiments. The relaxation time of the 3He polarization is sufficient for continuous use for approximately 2 days, thus reaching the typical duration required for a complete set of SANS experiments. Although accurate evaluation of the incoherent neutron scattering, which is predominantly attributable to the extremely large incoherent scattering cross section of hydrogen atoms in samples, is difficult using calculations based on the sample elemental composition, the developed NPA approach with consideration of the influence of multiple neutron scattering enabled reliable decomposition of the SANS intensity distribution into the coherent and incoherent scattering components. To date, NPA has not been well established as a standard technique for SANS experiments at pulsed neutron sources such as the Japan Proton Accelerator Research Complex (J-PARC) and the US Spallation Neutron Source. It is anticipated that this work will contribute significantly to the accurate determination of the coherent neutron scattering component for scatterers in various types of organic sample systems in SANS experiments at J-PARC, particularly for systems involving competition between the coherent and incoherent scattering intensity.

Quantitative spin polarization analysis in photoelectron emission microscopy with an imaging spin filter

2013 ◽  
Vol 130 ◽  
pp. 70-76 ◽  
Author(s):  
Christian Tusche ◽  
Martin Ellguth ◽  
Alexander Krasyuk ◽  
Aimo Winkelmann ◽  
Dmytro Kutnyakhov ◽  
...  
Keyword(s):  
Spin Polarization ◽  
Polarization Analysis ◽  
Spin Filter ◽  
Photoelectron Emission ◽  
Emission Microscopy ◽  
Photoelectron Emission Microscopy

Imaging magnetic microstructure with SEMPA

1993 ◽  
Vol 51 ◽  
pp. 1032-1033
Author(s):  
M. H. Kelley ◽  
J. Unguris ◽  
R. J. Celotta ◽  
D. T. Pierce
Keyword(s):  
Electron Microscopy ◽  
Thin Films ◽  
Scanning Electron Microscopy ◽  
Sandwich Structure ◽  
Magnetic Coupling ◽  
Polarization Analysis ◽  
Secondary Electrons ◽  
Magnetic Microstructure ◽  
Escape Depth ◽  
Scanning Electron

By measuring the spin polarization of secondary electrons generated in a scanning electron microscope, scanning electron microscopy with polarization analysis (SEMPA) can directly image the magnitude and direction of a material’s magnetization. Because the escape depth of the secondaries is only on the order of 1 nm, SEMPA is especially well-suited for investigating the magnetization of ultra-thin films and surfaces. We have exploited this feature of SEMPA to study the magnetic microstrcture and magnetic coupling in ferromagnetic multilayers where the layers may only be a few atomic layers thick. For example, we have measured the magnetic coupling in Fe/Cr/Fe(100) and Fe/Ag/Fe(100) trilayers and have found that the coupling oscillates between ferromagnetic and antiferromagnetic as a function of the Cr or Ag spacer thickness.The SEMPA apparatus has been described in detail elsewhere. The sample consisted of a magnetic sandwich structure with a wedge-shaped interlayer as shown in Fig. 1.

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