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ISSN - 00319007, EISSN - 10797114, Physical Review Letters, 2016, vol. 117, 5, p. -

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

Guidoboni G., Stephenson E., Andrianov S., Augustyniak W., Bagdasarian Z., Bai M., Baylac M., Bernreuther W., Bertelli S., Berz M., Böker J., Böhme C., Bsaisou J., Chekmenev S., Chiladze D., Ciullo G., Contalbrigo M., De Conto J. M., Dymov S., Engels R., Esser F. M., Eversmann D., Felden O., Gaisser M., Gebel R., Glückler H., Goldenbaum F., Grigoryev K., Grzonka D., Hahnraths T., Heberling D., Hejny V., Hempelmann N., Hetzel J., Hinder F., Hipple R., Hölscher D., Ivanov A., Kacharava A., Kamerdzhiev V., Kamys B., Keshelashvili I., Khoukaz A., Koop I., Krause H. J., Krewald S., Kulikov A., Lehrach A., Lenisa P., Lomidze N., Lorentz B., Maanen P., Macharashvili G., Magiera A., Maier R., Makino K., Mariański B., McHedlishvili D., Meißner Ulf G., Mey S., Morse W., Müller F., Nass A., Natour G., Nikolaev N., Nioradze M., Nowakowski K., Orlov Y., Pesce A., Prasuhn D., Pretz J., Rathmann F., Ritman J., Rosenthal M., Rudy Z., Saleev A., Sefzick T., Semertzidis Y.

© 2016 American Physical Society.We observe a deuteron beam polarization lifetime near 1000 s in the horizontal plane of a magnetic storage ring (COSY). This long spin coherence time is 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.