Measuring the electric dipole moment of the neutron: The cryoEDM experiment

Measuring the electric dipole moment of the neutron: The cryoEDM experiment

The cryoEDM experiment at the Institut Laue-Langevin in Grenoble will measure the electric dipole moment (EDM) of the neutron with unparalleled precision. A neutron EDM arises due to CP violation. The cryoEDM experiment is sensitive to levels of CP violation predicted by many "beyond the standa...

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Bibliografiske detaljer
Main Authors: Baker, C, Balashov, SN, Francis, V, Green, K, Van Der Grinten, M, Iaydjiev, P, Ivanov, SN, Khazov, A, Tucker, M, Wark, D, Davidson, A, Grozier, JR, Hardiman, M, Harris, P, Karamath, JR, Katsika, K, Pendlebury, J, Peeters, S, Shiers, D, Smith, P, Townsley, C, Wardell, I, Clarke, C, Henry, S, Kraus, H
Format: Conference item
Udgivet: 2009
Beskrivelse
Summary:The cryoEDM experiment at the Institut Laue-Langevin in Grenoble will measure the electric dipole moment (EDM) of the neutron with unparalleled precision. A neutron EDM arises due to CP violation. The cryoEDM experiment is sensitive to levels of CP violation predicted by many "beyond the standard model" theories and the result will therefore constrain or support these theories. The current limit to the neutron EDM stands at |dn| < 2.9 × 10-26 e cm as measured with a room temperature experiment. By operating in superfluid helium below 0.9 K and collecting high densities of ultra cold neutrons, the cryoEDM experiment will improve on the existing limit or measure an EDM. High precision magnetometry is essential to reduce the systematic errors in the cryoEDM experiment originating from changes in the magnetic environment. We present the cryoEDM apparatus and technologies. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.

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