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The idea of this experiment is based on the neutron interaction with a strong
interplanar electric field of a noncentrosymmetric crystal. Value of
the field can reach 109 V/cm, that exceeds the value available in
any other method by about 5 orders of magnitude.
The aim of this project is to reach the sensitivity better than
10- 26 e·cm.
Publications
- Laue diffraction method of a neutron EDM search. Project of the experiment. V.V. Voronin, V.V. Fedorov, E.G. Lapin, S.Yu. Semenikhin
- Neutron spin rotation in a non-centrosymmetric crystal. New possibilities for experiments on the neutron EDM search & DEDM-V project. Search for the neutron EDM by crystal diffraction method. Voronin V.V., ILL Seminar 30 Jan. 2006. (PDF presentation, 1.3 MB).
- Status of the crystal-diffraction neutron EDM experiment. Voronin V.V., ILL Seminar 15 Nov. 2007. (PDF presentation, 1.2 MB).
- Crystal-diffraction nEDM search experiment. Voronin V.V., PNCMI-2010. (PDF presentation, 4.3 MB).
- Эффект аномальной дисперсии при прохождении нейтронов через кристалл вблизи условия Брэгга.
Воронин В.В., РНИКС-2012. (PDF презентация, 1.4 МБ).
- Поиск ЭДМ нейтрона кристалл-дифракционным методом. В.В. Воронин, Ю.П. Брагинец, Е.О. Вежлев, И.А. Кузнецов, Е.Г. Лапин, М.В. Ласица, С.Ю. Семенихин, В.В. Федоров. PHCИ-KC 2014. (PPT презентация, 3.2 МБ).
- Особенности нейтронной оптики вблизи брэгговского отражения. Воронин В.В. PHCИ-KC 2014. (PPT презентация, 1.9 МБ).
The method is based on an essential magnification of external
effect on neutron diffracting by Laue for the Bragg angles ΘB
close to right one. The factor of
diffraction enhancement for the neutron trajectory "curvature" due to
external field can reach about ~(108 - 109) in comparison with a free neutron.
The aim of this project is to reach the accuracy to measure the ratio of inertial
to gravitational neutron masses about σ(mi / mG) ~
10-6 that more than two orders exceeds modern precision.
Publications
A simple method for the relative measurement of the interplanar
distances of high perfect crystals with a high precision has been
proposed. It is based on the comparison of the interplanar distances
of two crystals using neutron transmission through one crystal and
back reflection by the reference second crystal at Bragg angles close
to 90° The method allows us to measure the variation of the
crystal interplanar distance Δd relatively to the reference
with the accuracy Δd/d better than 10-7.
Publications
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Neutron volumetric test of a high perfect crystal quality. I.A. Kuznetsov, V.V. Fedorov, E.G.Lapin, S.Yu. Semenikhin, V.V. Voronin, Yu.P. Braginetz, K.Yu. Amosov. RREPS-07, Prague 24-28 September, 2007 (PDF presentation, 411 KB).
- Новый метод прецизионной структурной интроскопии кристаллов большого размера.
Семенихин С.Ю., Воронин В.В., Федоров В.В., Кузнецов И.А., Лапин Е.Г., Вежлев Е.О., РНИКС-2012. (PDF постер, 6.9 МБ).
New method to measure a neutron electric charge is proposed. The main idea is to use SESANS technique,
which provides a spacial splitting of neutron onto two eigenstates with different projection of spin on magnetic field.
After passing through working area with applied uniform electric field E these two eigenstates are coupled back.
Therefore, the phase of interference pattern, i.e. azimuthal spin direction, is defined by phase difference of two
neutron eigenstates accumulated in the working area. This phase will be determined by the nonzero neutron electric charge.
Preliminary estimations demonstrate that using this technique can improve the current constrain on neutron electric charge at least on one order of magnitude.
Publications
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Russian version 
Laboratory
Neuron EDM search by crystal-diffraction method
