Time-of-flight spectrometry of ultracold neutrons with a thin film ferromagnetic chopper

Novopoltsev, M. I.; Pokotilovskii, Yu. N.; Shelkova, I.G.

doi:10.1016/0168-9002(88)90949-7

Cited by 6 publications

(3 citation statements)

References 2 publications

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“…Infiltration gives rise to the anomalous large permeability of weakly captured thin films to UCN. But it necessary to stress, that non potential effects may manifest itself only for the matter with relatively small neutron capture cross section, when 2 !1 << aa (b' > 0) (8) b' k Hence, the physical picture of interaction of the long wavelength neutrons with matter predicted in 12,29 essentially differs from the commonly accepted one. That circumstance became a very actual problem for the experimental testing of the dispersion law for UCN.…”

Section: Characteristics Of the Spectrometermentioning

confidence: 88%

“…That may have happened if the absorption cross-section of the material of the new filters was remarkably greater than that of the others. Then the requirement (8) would not be satisfied and the correction terms would be suppressed. That looks now very unlikely that there was any pollution by high-absorption material but that may be tested by the analysis of filter material.…”

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confidence: 96%

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<title>Neutron multilayer structures for fundamental experiments in UCN optics</title>

et al. 1999

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The experience in manufacturing and testing of neutron multilayer structures, interference filters, is described.Construction of a gravity UCN spectrometer based on the use of such devices is also reported. Some results of the test experiment of the UCN dispersion law performed with such a spectrometer are presented. Among them are the resonant mode mixing effect due to scattering by the roughness. Some possibilities of new experiments based on a similar method are investigated.

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Section: Characteristics Of the Spectrometermentioning

confidence: 88%

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confidence: 96%

<title>Neutron multilayer structures for fundamental experiments in UCN optics</title>

et al. 1999

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“…On the observation of resonant tunneling UCN through NIF was reported in papers [36][37][38]. The physical effects that arise as ultracold neutrons pass through a NIF oscillating in space are the subject of the recent work [16] in which main attention is paid to non-stationary effects arising at fast modulation of the wave that passes through an oscillating potential structure.…”

Section: Resonant Tunneling Of Neutrons Through a Double Potential Ba...mentioning

confidence: 99%

Interaction of a wave packet with potential structures moving with acceleration

Zakharov,

Kulin,

Frank

2020

Preprint

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The paper is devoted to a numerical study of the problem of interaction of the wave packet with potential structures moving with constant acceleration. In all the cases considered the result of the interaction is a change in the velocity spectrum. In the first approximation the magnitude of the shift in the spectrum is determined by the product of acceleration by group delay time. Also, as the direction of acceleration reverses the effect changes its sign. The results are completely consistent with the idea of universality of the Effect of Acceleration which consists in a change in the frequency of the wave at scattering on an object moving with acceleration.

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Spectrometer for new gravitational experiment with UCN

Kulin

Frank

Goryunov

et al. 2015

Nuclear Instruments and Methods in Physics Research Section A:

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We describe an experimental installation for a new test of the weak equivalence principle for neutron. The device is a sensitive gravitational spectrometer for ultra-cold neutrons allowing to precisely compare the gain in kinetic energy of free falling neutrons to quanta of energy ${\hbar}{\Omega}$ transferred to the neutron via a non stationary device, i.e. a quantum modulator. The results of first test experiments indicate a collection rate allowing measurements of the factor of equivalence $ { \gamma}$ with a statistical uncertainty in the order of $5{\times}10^{-3}$ per day. A number of systematic effects were found, which partially can be easily corrected. For the elimination of others more detailed investigations and analysis are needed. Some possibilities to improve the device are also discussed.Comment: Submitted to NIM

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Time-of-flight spectrometry of ultracold neutrons with a thin film ferromagnetic chopper

Cited by 6 publications

References 2 publications

<title>Neutron multilayer structures for fundamental experiments in UCN optics</title>

<title>Neutron multilayer structures for fundamental experiments in UCN optics</title>

Interaction of a wave packet with potential structures moving with acceleration

Spectrometer for new gravitational experiment with UCN

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