The search for an electric dipole moment (EDM) using a polarized, charged-particle beam in a storage ring requires ring conditions that can maintain a longitudinal polarization for times up to 1000 s. This situation is unstable against the spread of the particle spins in the horizontal plane, so a method to control this effect must be demonstrated. For this reason, a series of dedicated studies is being performed at the COoler SYnchrotron (COSY) at the Forschungszentrum-Jülich to examine the effects of emittance spread on the spin coherence time. To support these studies, a novel polarimeter system has been developed that can monitor the horizontal polarization of the beam circulating in the ring as it precesses at ~120 kHz
Search for Electric Dipole Moments with Polarized Beams in Storage Rings.
LENISA, Paolo;GUIDOBONI, Greta;
2013
Abstract
The search for an electric dipole moment (EDM) using a polarized, charged-particle beam in a storage ring requires ring conditions that can maintain a longitudinal polarization for times up to 1000 s. This situation is unstable against the spread of the particle spins in the horizontal plane, so a method to control this effect must be demonstrated. For this reason, a series of dedicated studies is being performed at the COoler SYnchrotron (COSY) at the Forschungszentrum-Jülich to examine the effects of emittance spread on the spin coherence time. To support these studies, a novel polarimeter system has been developed that can monitor the horizontal polarization of the beam circulating in the ring as it precesses at ~120 kHzI documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
