FUNSPIN polarized cold-neutron beam at PSI

Zejma, J.; Ban, G.; Beck, M.; Białek, A.; Bodek, K.; Frei, G.; Hilbes, Christian; Kühne, G.; Gorel, P.; Kirch, K.; Kistryn, S.; Kozela, A.; Kuźniak, M.; Lindroth, A.; Naviliat‐Cuncic, O.; Pulut, J.; Severijns, N.; Stephan, E.

doi:10.1016/j.nima.2004.11.004

Cited by 33 publications

(30 citation statements)

References 10 publications

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“…Being governed by the electromagnetic interactions such modulations are constrained much more stringently in other experiments. The first two effects were studied in the past in the performance tests of the experimental apparatus [11,12] and have been estimated to η ≈ 0.0012 and ε ≈ 0.005, respectively. The asymmetry of the average efficiencies of the lower and upper detector parts was calculated directly from the data: λ ≈ 0.05.…”

Section: Discussionmentioning

confidence: 99%

Lorentz invariance violation in weak interaction: search for effects in beta decay of polarized neutrons

Bodek¹

2014

Proceedings of 10th Latin American Symposium on Nuclear Physics and Applications — PoS(X LASNPA)

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Lorentz Invariance (LI) belongs to the most basic principles underlying our understanding of nature. No compelling evidence for its violation has been found so far but various tests with increasing accuracy are ongoing motivated by the search for new physics. Among the four interactions, electromagnetism imposes the most stringent constraints while very little is known about the weak interaction in this context. Sidereal and daily modulations have been searched for in beta decay of free polarized neutrons. A sample of about 3 × 10 8 decay electrons distributed over a three month long data taking period were analyzed. Independent upper limits have been deduced for the coupling of the neutron spin and the electron momentum to an external field postulated as an exotic admixture to the weak interaction dominating in neutron decay [1]. Recently, a formalism was developed within the effective field theory approach including a tensor term in the gauge boson propagator which explicitly violates LI [2]. This formalism allows to interpret the investigated sidereal modulations of the neutron beta decay observables from Ref.[1] in terms of the SME parameters [3,4]. The resulting upper limits for certain combinations of these parameters were calculated.

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Section: Discussionmentioning

confidence: 99%

Lorentz invariance violation in weak interaction: search for effects in beta decay of polarized neutrons

Bodek¹

2014

Proceedings of 10th Latin American Symposium on Nuclear Physics and Applications — PoS(X LASNPA)

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“…After first feasibility studies there is potential for improvement of the setup regarding spatial resolution, field of view and sensitivity for magnetic fields. The beam line FUNSPIN at SINQ [17], providing a polarized beam, can be modified in the future to a test device for polarized neutron imaging.…”

Section: Future Trends In Neutron Imagingmentioning

confidence: 99%

Neutron imaging at PSI: a promising tool in materials science and technology

Lehmann

Wagner

2010

Appl. Phys. A

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Neutron imaging as a method for non-destructive studies takes advantage of the alternative contrast mechanism of neutrons compared to X-rays: most of the light elements feature high contrast, whereas heavy elements are relatively transparent to neutrons. In the previous decade, the neutron imaging technique has made substantial progress in well-tailored and well-equipped beam lines, in improvements of the image recording quality and efficiency by new and modern imaging techniques, and in modern image processing tools.This article gives an overview of PSI's activities in this promising and still developing field combining high potential as research tool and as technique for industrial investigation and non-destructive testing. Examples are chosen from the fields of energy and mobility and inspection of highly activated samples. Furthermore, recent developments in phase contrast imaging and energy selective imaging studies are highlighted. Finally, future trends in neutron imaging are addressed.

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“…The nd-experiment was carried out at the fundamental neutron physics beam line FUNSPIN at PSI [Zej05]. Its polarised cold wavelength spectrum peaks at about 3.6 Å and the integrated neutron flux is about 2.5 !…”

Section: The Funspin Beam Linementioning

confidence: 99%