%0 Journal Article
%A Hempelmann, N.
%A Hejny, V.
%A Pretz, J.
%A Stephenson, E.
%A Augustyniak, W.
%A Bagdasarian, Z.
%A Bai, M.
%A Barion, L.
%A Berz, M.
%A Chekmenev, S.
%A Ciullo, G.
%A Dymov, S.
%A Etzkorn, F.-J.
%A Eversmann, D.
%A Gaisser, M.
%A Gebel, R.
%A Grigoryev, K.
%A Grzonka, D.
%A Guidoboni, G.
%A Hahnraths - von der Gracht, Tanja
%A Heberling, D.
%A Hetzel, J.
%A Hinder, F.
%A Kacharava, A.
%A Kamerdzhiev, V.
%A Keshelashvili, I.
%A Koop, I.
%A Kulikov, A.
%A Lehrach, A.
%A Lenisa, P.
%A Lomidze, N.
%A Lorentz, B.
%A Maanen, P.
%A Macharashvili, G.
%A Magiera, A.
%A Mchedlishvili, D.
%A Mey, S.
%A Müller, F.
%A Nass, A.
%A Nikolaev, N. N.
%A Pesce, A.
%A Prasuhn, D.
%A Rathmann, F.
%A Rosenthal, M.
%A Saleev, A.
%A Schmidt, V.
%A Semertzidis, Y.
%A Shmakova, V.
%A Silenko, A.
%A Slim, J.
%A Soltner, H.
%A Stahl, A.
%A Stassen, R.
%A Stockhorst, H.
%A Stroeher, Hans
%A Tabidze, M.
%A Tagliente, G.
%A Talman, R.
%A Thörngren Engblom, P.
%A Trinkel, F.
%A Uzikov, Yu.
%A Valdau, Yu.
%A Valetov, E.
%A Vassiliev, A.
%A Weidemann, C.
%A Wrońska, A.
%A Wüstner, P.
%A Zuprański, P.
%A Żurek, M.
%T Phase Locking the Spin Precession in a Storage Ring
%J Physical review letters
%V 119
%N 1
%@ 1079-7114
%C College Park, Md.
%I APS
%M FZJ-2017-04486
%P 014801
%D 2017
%X This Letter reports the successful use of feedback from a spin polarization measurement to the revolution frequency of a 0.97  GeV/c bunched and polarized deuteron beam in the Cooler Synchrotron (COSY) storage ring in order to control both the precession rate (≈121  kHz) and the phase of the horizontal polarization component. Real time synchronization with a radio frequency (rf) solenoid made possible the rotation of the polarization out of the horizontal plane, yielding a demonstration of the feedback method to manipulate the polarization. In particular, the rotation rate shows a sinusoidal function of the horizontal polarization phase (relative to the rf solenoid), which was controlled to within a 1 standard deviation range of σ=0.21  rad. The minimum possible adjustment was 3.7 mHz out of a revolution frequency of 753 kHz, which changes the precession rate by 26  mrad/s. Such a capability meets a requirement for the use of storage rings to look for an intrinsic electric dipole moment of charged particles.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000418530600001
%$ pmid:28731757
%R 10.1103/PhysRevLett.119.014801
%U https://juser.fz-juelich.de/record/834558