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Electric Dipole Moments using storage rings
(Grant Agreement Number 694340)

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How to Reach a Thousand-Second in-Plane Polarization Lifetime with 0.97 GeV/c Deuterons in a Storage Ring

A deuteron beam polarization lifetime near 1000 seconds in the horizontal plane of the magnetic storage ring COSY has been observed. This long spin coherence time was maintained through a combination of beam bunching, electron cooling, sextupole field corrections, and the suppression of collective effects through beam current limits. This record lifetime is required for a storage ring search for an intrinsic electric dipole moment on the deuteron at a statistical sensitivity level approaching 10-29 e∙cm.