Quasi-Frozen Spin Concept of Deuteron Storage Ring as an Instrument to Search for the Electric Dipole Moment

Y. Senichev, A. Aksentyev, S. Chekmenev, J. Pretz, S. Andrianov, A. Ivanov, M. Berz, E. Valetov

Research outputpeer-review


One of the possible arguments for the breaking of CP invariance is the existence of non-vanishing electric dipole moments (EDM) of elementary particles. Currently, the Jülich Electric Dipole Moment Investigation (JEDI) collaboration works under the conceptual design of the ring specifically for search of the deuteron electrical dipole moment (dEDM). The proposed Quasi-Frozen Spin concept differs from the Frozen Spin concept in that the spin of the reference particle is alternately deflected by a few degrees in different directions relative to momentum in the electric and magnetic parts of the ring. The QFS concept will allow using the existing COSY ring as pilot facility. The paper presents conceptual approach to ring design based on results of a study of spin decoherence and systematic errors, as well as the sensitivity estimation of the method to the determination of EDM.
Original languageEnglish
Title of host publicationProceedings of the 8th International Particle Accelerator Conference
EditorsVolker RW Schaa, Gianluigi Arduini, Juliana Pranke, Mike Seidel, Mats Lindroos
Place of PublicationGeneva, Switzerland
Number of pages3
ISBN (Print)978-3-95450-182-3
Publication statusPublished - May 2017

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