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RIS citation export for MOPTS012: Spin Decoherence in the Frozen Spin Storage Ring Method of Search for a Particle EDM

AU  - Aksentyev, A.E.
AU  - Senichev, V.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Spin Decoherence in the Frozen Spin Storage Ring Method of Search for a Particle EDM
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - Spin coherence refers to a measure of preservation of polarization in an initially polarized beam. The spin vector of a particle injected into a storage ring starts to precess about the vertical magnetic field vector in accordance with the Thomas-BMT equation. The precession frequency is dependent on the equilibrium-level energy, which differs across the beam particles. This does not pose a problem when the initial polarization is vertical; however, the Frozen Spin Storage Ring EDM search method [*] requires beam polarization along the momentum vector, i.e., in the horizontal plane. In the present work we analyze the source of decoherence, and investigate the way it can be suppressed in the horizontal plane in a perfectly aligned ring by means of sextupole fields. We also consider the case of an imperfect ring: transference of decoherence into the vertical plane induced by vertical plane spin precession, and the effect of sextupole fields.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 864
EP  - 866
KW  - sextupole
KW  - storage-ring
KW  - lattice
KW  - simulation
KW  - betatron
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-MOPTS012
UR  - http://jacow.org/ipac2019/papers/mopts012.pdf
ER  -