Monte-Carlo simulations for the optimisation of a TOF-MIEZE instrument

Weber, T.; Brandl, Georg; Georgii, R.; Häußler, W.; Weichselbaumer, Stefan; Böni, P.

doi:10.1016/j.nima.2013.03.010

Cited by 21 publications

(16 citation statements)

References 23 publications

(44 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As mentioned above 16,17 and confirmed by our simulations, in MIEZE-I, the signal decreases with increasing q due to path length variations at the sample. However, figure 2 shows that at small q-values, MIEZE-I overcomes the other techniques by at least a factor of 3 in signal strength, if a incoherent scattering system is studied.…”

Section: Results Of Simulations and Experimentssupporting

confidence: 84%

“…The NRSE/MIEZE frequency and flight path are set to 100 khz and 80 cm, respectively (corresponding to the field integral 0.53 T·cm), and λ=10.4 Å leading to a spin echo time of 1.15 ns. The MIEZE-I signal and the NRSE signal from a coherent scatterer of radius 3 mm are simulated in 61 and 31 q-steps, respectively, and in agreement with the data presented in [16] and [17]. The incoherent signal is reduced according to the SF/NSF scattering ratio of 2/3 to 1/3 (eqs.…”

Section: Results Of Simulations and Experimentssupporting

confidence: 74%

“…Therefore, the MIEZE-I signal suffers from path length differences increasing with increasing scattering angle Φ 16,17 . Thus, MIEZE-I experiments are restricted to certain scattering geometries and sample dimensions.…”

Section: Mieze and Spin Analysis At Resedamentioning

confidence: 99%

See 2 more Smart Citations

Dynamic neutron scattering on incoherent systems using efficient resonance spin flip techniques

Häußler¹,

Kredler²

2014

AIP Conference Proceedings

View full text Add to dashboard Cite

We have performed numerical ray-tracing Monte-Carlo-simulations of incoherent dynamic neutron scattering experiments. We intend to optimize the efficiency of incoherent measurements depending on the fraction of neutrons scattered without and with spin flip at the sample. In addition to conventional spin echo, we have numerically and experimentally studied oscillating intensity techniques. The results point out the advantages of these different spin echo variants and are an important prerequisite for neutron resonance spin echo instruments like RESEDA (FRM II, Munich), to choose the most efficient technique depending on the scattering vector range and the properties of the sample system under study

show abstract

Section: Results Of Simulations and Experimentssupporting

confidence: 84%

Section: Results Of Simulations and Experimentssupporting

confidence: 74%

See 1 more Smart Citation

Dynamic neutron scattering on incoherent systems using efficient resonance spin flip techniques

Häußler¹,

Kredler²

2014

AIP Conference Proceedings

View full text Add to dashboard Cite

show abstract

“…In Refs. [21,25], the problem has been further specified by a combination of analytical calculations and Monte-Carlo simulations.…”

Section: Principles and Limits Of Mieze Spectroscopymentioning

confidence: 99%

On the resolution of a MIEZE spectrometer

Martín

2018

Nuclear Instruments and Methods in Physics Research Section A:

View full text Add to dashboard Cite

We study the effect of a finite sample size, beam divergence and detector thickness on the resolution function of a MIEZE spectrometer. We provide a transparent analytical framework which can be used to determine the optimal trade-off between incoming flux and time resolution for a given experimental configuration. The key result of our approach is that the usual limiting factor of MIEZE spectroscopy, namely neutron path length differences throughout the instrument, can be suppressed up to relatively large momentum transfers by using a proper small-angle (SANS) geometry. Under such configuration, the hitherto accepted limits of MIEZE spectroscopy in terms of time-resolution are pushed upwards by typically an order of magnitude, giving access to most of the topical fields in soft- and hard-condensed matter physics.Comment: 19 pages, 6 figure

show abstract

“…7,8 An MIEZE instrument is also proposed at the European Spallation Source (ESS) in Sweden. 9,10 The contrast of a MIEZE signal is sensitive to differences in the length of the neutron flight path. This drawback is very severe and it has hampered the use of MIEZE spectrometers in steady-state neutron sources.…”

Section: Introductionmentioning

confidence: 99%

Pulsed neutron time-dependent intensity modulation for quasi-elastic neutron scattering spectroscopy

Oda

Hino

Kitaguchi

et al. 2016

Review of Scientific Instruments

View full text Add to dashboard Cite

We propose a basic formula and demonstration for a high-resolution quasi-elastic neutron scattering (QENS) by combining the time-of-flight (TOF) method with Modulation of Intensity by Zero Effort (MIEZE) type neutron spin echo spectroscopy. The MIEZE technique has the potential to develop a unique approach to study on slow dynamics of condensed matter; however, the energy resolution is limited owing to the hypersensitivity of the MIEZE signal contrast to the echo condition, which is strongly affected by the alignment of the instruments and the sample. The narrow allowance of the optimal alignment is a major obstacle to the wide use of this technique. Combining the TOF method with MIEZE (TOF-MIEZE), the hypersensitivity of MIEZE signals is significantly alleviated with a short pulsed beam. This robustness is very useful to optimize experimental alignments and enables accurate measurements of QENS. The experimental results demonstrate the characteristic of the TOF-MIEZE technique and are well described by the formula presented in this study.

show abstract

Monte-Carlo simulations for the optimisation of a TOF-MIEZE instrument

Cited by 21 publications

References 23 publications

Dynamic neutron scattering on incoherent systems using efficient resonance spin flip techniques

Dynamic neutron scattering on incoherent systems using efficient resonance spin flip techniques

On the resolution of a MIEZE spectrometer

Pulsed neutron time-dependent intensity modulation for quasi-elastic neutron scattering spectroscopy

Contact Info

Product

Resources

About