The resolution of the MIEZE setup on the longitudinal neutron resonance spin-echo spectrometer at CMRR

Liu, B.; Wang, Z.; Wang, Y.; Huang, Congcong; Sun, G. A.

doi:10.1088/1748-0221/15/04/p04007

Cited by 8 publications

(4 citation statements)

References 39 publications

(43 reference statements)

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“…An alternative approach to allow for the complicated sample environment that involves high magnetic field and depolarizing sample is to use modulation of intensity emerging from zero effort (MIEZE) (Ga ¨hler et al, 1992), which has been demonstrated or routinely operated at several neutron facilities, including Larmor at ISIS (Geerits et al, 2019), ORNL (Brandl et al, 2012;Dadisman et al, 2020;Zhao et al, 2015), CMRR (Liu et al, 2020), RESEDA of FRM-II and VIN ROSE at J-PARC (Hino et al, 2013). Depending on the direction of the static magnetic field inside the radio-frequency (RF) flippers with respect to the beam, there are longitudinal and transverse configurations for MIEZE.…”

Section: Mieze and Its Larmor Phase Aberrationmentioning

confidence: 99%

The linear phase correction of modulation of intensity emerging from zero effort (MIEZE) with magnetic Wollaston prisms

2022

J Appl Cryst

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This study proposes the use of two magnetic Wollaston prisms (MWPs) to correct for the linear Larmor phase aberration of modulation of intensity emerging from zero effort (MIEZE), introduced by the transverse size of the sample. With this approach, the contrast of the intensity modulation can be maximized at any scattering angle of interest such that the same contrast as the direct transmission geometry can be fully recovered. The optimum magnetic fields required for the MWPs depend only on the scattering angle and the frequencies of the radio-frequency flippers, and they are independent of the neutron wavelength and beam divergence, which makes the approach suitable for both pulsed and continuous neutron sources.

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Section: Mieze and Its Larmor Phase Aberrationmentioning

confidence: 99%

The linear phase correction of modulation of intensity emerging from zero effort (MIEZE) with magnetic Wollaston prisms

2022

J Appl Cryst

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“…Currently, three longitudinal MIEZE spectrometers are under development at reactor sources: (1) A longitudinal neutron resonance spin -echo spectrometer combined with a MIEZE configuration is planned at the C33 beam port at China Mianyang Research Reactor (CMRR) [47]; (2) The SEM spectrometer at the PIK reactor complex is planned as a longitudinal neutron resonant spinecho spectrometer with a MIEZE option [40]; (3) Furthermore, a SANS setup with MIEZE option is being installed at the ILL [55].…”

Section: State Of the Artmentioning

confidence: 99%

Extending MIEZE spectroscopy towards thermal wavelengths

Jochum¹,

Keller²,

Pfleiderer³

2022

Preprint

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We propose a Modulation of intensity with zero effort (MIEZE) setup for high -resolution neutron spectroscopy at momentum transfers up to 3 Å−1 ,energy transfers up to 20 meV, and an energy resolution in the µeVrange using both thermal and cold neutrons. MIEZE has two prominent advantages compared to classical neutron spin -echo. The first one is the possibility to investigate spin -depolarizing samples or samples in strong magnetic fields without loss of signal amplitude and intensity. This allows for the study of spin fluctuations in ferromagnets, and facilitates the study of samples with strong spin -incoherent scattering. The second advantage is that multi -analyzer setups can be implemented with comparatively small effort. The use of thermal neutrons increases the range of validity of the spin -echo approximation towards shorter spin -echo times. In turn, the thermal MIEZE option for greater ranges (TIGER) closes the gap between classical neutron spin -echo spectroscopy and conventional highresolution neutron spectroscopy techniques such as triple -axis, time -offlight, and back -scattering. To illustrate the feasibility of TIGER we present the details of an implementation at the beamline RESEDA at FRM II by means of an additional velocity selector, polarizer and analyzer.

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“…Modulation of Intensity with Zero Effort (MIEZE) is a neutron resonant spin-echo technique variation where potential information loss via depolarization of the Larmor precessing spins prepared by the resonant flippers is preempted by placing a spin analyzer just before the sample position, which results in an intensity modulated neutron beam downstream of the analyzer [27][28][29][30][31][32][33]. No further beam manipulation components are placed between the sample and the detector in contrast to conventional NSE and NRSE.…”

Section: B the Mieze Techniquementioning

confidence: 99%

MIASANS at the longitudinal neutron resonant spin-echo spectrometer RESEDA

2022

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The RESEDA (Resonant Spin-Echo for Diverse Applications) instrument has been optimized for neutron scattering measurements of quasi-elastic and inelastic processes over a wide parameter range. One spectrometer arm of RESEDA is configured for the MIEZE (Modulation of Intensity with Zero Effort) technique, where the measured signal is an oscillation in neutron intensity over time prepared by two precisely tuned radio-frequency (RF) flippers. With MIEZE, all spin-manipulations are performed before the beam reaches the sample, and thus the signal from sample scattering is not disrupted by any depolarizing conditions there (i.e. magnetic materials and fields). The MIEZE spectrometer is being further optimized for the requirements of small angle neutron scattering (MIASANS), a versatile combination of the spatial and dynamical resolving power of both techniques. We present the current status of (i) the newly installed superconducting solenoids as part of the RF flippers to significantly extend the dynamic range (ii) the development and installation of a new detector on a translation stage within a new larger SANS-type vacuum vessel for flexibility with angular coverage and resolution, and (iii) the efforts to reduce background.

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The resolution of the MIEZE setup on the longitudinal neutron resonance spin-echo spectrometer at CMRR

Cited by 8 publications

References 39 publications

The linear phase correction of modulation of intensity emerging from zero effort (MIEZE) with magnetic Wollaston prisms

The linear phase correction of modulation of intensity emerging from zero effort (MIEZE) with magnetic Wollaston prisms

Extending MIEZE spectroscopy towards thermal wavelengths

MIASANS at the longitudinal neutron resonant spin-echo spectrometer RESEDA

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