Precursor Experiments to Search for Permanent Electric Dipole Moments   (EDMs) of Protons and Deuterons at COSY
  In this presentation we discuss a number of experiments on the search for proton or deuteron EDMs, which could be carried out at COSY-Juelich. Most promising is the use of an radio-frequency radial electric field flipper that would lead to the accumulation of a CP violating in-plane beam polarization by tiny spin rotations. Most crucial for storage ring searches for EDMs is the spin-coherence time, and we report on analytic evaluations which point at a much larger spin-coherence time for deuterons by about a factor of 200 compared to the one for protons, and at COSY, the spin coherence time for deuterons could amount to about 10 000 s. 
Andreas Lehrach, Bernd Lorentz, William Morse, Nikolai Nikolaev and   Frank Rathmann
hep-ex nucl-ex physics.acc-ph