Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2005-12-23
Physics
High Energy Physics
High Energy Physics - Experiment
12 pages, 6 figures
Scientific paper
A prototype experiment to measure the neutron electric dipole moment (nEDM) by spin-rotation in a non-centrosymmetric crystal in Laue geometry was carried out in order to investigate the statistical sensitivity and systematic effects of the method. The statistical sensitivity to the nEDM was about $6\cdot 10^{-24}$ e$\cdot $cm per day and can be improved by one order of magnitude for the full scale setup. Systematics was limited by the homogeneity of the magnetic field in the crystal region and by a new kind of spin rotation effect. We attribute this effect to a difference of the two Bloch waves amplitudes in the crystal, which is caused by the presence of a small crystal deformation due to a temperature gradient. In a revised scheme of the experiment, this effect could be exploited for a purposeful manipulation of the Bloch waves.
Fedorov V. V.
Lapin E. G.
Lelievre-Berna E.
Nesvizhevsky Valery V.
Petoukhov A.
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