Phase Locking the Spin Precession in a Storage Ring

Hempelmann, N.; Etzkorn, F.-J.; Müller, F.; Keshelashvili, I.; Maanen, P.; Lomidze, N.; Weidemann, C.; Silenko, A.; Grigoryev, K.; Gebel, R.; Guidoboni, G.; Augustyniak, W.; Bagdasarian, Z.; Lorentz, B.; Bai, M.; Wrońska, A.; Stroeher, Hans; Hinder, F.; Tabidze, M.; Trinkel, F.; Hahnraths - von der Gracht, Tanja; Pretz, J.; Thörngren Engblom, P.; Stockhorst, H.; Hetzel, J.; Lenisa, P.; Hejny, V.; Koop, I.; Wüstner, P.; Barion, L.; Żurek, M.; Magiera, A.; Chekmenev, S.; Soltner, H.; Shmakova, V.; Grzonka, D.; Dymov, S.; Stassen, R.; Valetov, E.; Berz, M.; Lehrach, A.; Gaisser, M.; Tagliente, G.; Mey, S.; Uzikov, Yu.; Heberling, D.; Nikolaev, N. N.; Rathmann, F.; Kamerdzhiev, V.; Schmidt, V.; Pesce, A.; Saleev, A.; Stephenson, E.; Eversmann, D.; Nass, A.; Macharashvili, G.; Talman, R.; Valdau, Yu.; Mchedlishvili, D.; Slim, J.; Kacharava, A.; Semertzidis, Y.; Prasuhn, D.; Ciullo, G.; Kulikov, A.; Zuprański, P.; Vassiliev, A.; Stahl, A.; Rosenthal, M.

doi:10.1103/PhysRevLett.119.014801

TY  - JOUR
AU  - Hempelmann, N.
AU  - Hejny, V.
AU  - Pretz, J.
AU  - Stephenson, E.
AU  - Augustyniak, W.
AU  - Bagdasarian, Z.
AU  - Bai, M.
AU  - Barion, L.
AU  - Berz, M.
AU  - Chekmenev, S.
AU  - Ciullo, G.
AU  - Dymov, S.
AU  - Etzkorn, F.-J.
AU  - Eversmann, D.
AU  - Gaisser, M.
AU  - Gebel, R.
AU  - Grigoryev, K.
AU  - Grzonka, D.
AU  - Guidoboni, G.
AU  - Hahnraths - von der Gracht, Tanja
AU  - Heberling, D.
AU  - Hetzel, J.
AU  - Hinder, F.
AU  - Kacharava, A.
AU  - Kamerdzhiev, V.
AU  - Keshelashvili, I.
AU  - Koop, I.
AU  - Kulikov, A.
AU  - Lehrach, A.
AU  - Lenisa, P.
AU  - Lomidze, N.
AU  - Lorentz, B.
AU  - Maanen, P.
AU  - Macharashvili, G.
AU  - Magiera, A.
AU  - Mchedlishvili, D.
AU  - Mey, S.
AU  - Müller, F.
AU  - Nass, A.
AU  - Nikolaev, N. N.
AU  - Pesce, A.
AU  - Prasuhn, D.
AU  - Rathmann, F.
AU  - Rosenthal, M.
AU  - Saleev, A.
AU  - Schmidt, V.
AU  - Semertzidis, Y.
AU  - Shmakova, V.
AU  - Silenko, A.
AU  - Slim, J.
AU  - Soltner, H.
AU  - Stahl, A.
AU  - Stassen, R.
AU  - Stockhorst, H.
AU  - Stroeher, Hans
AU  - Tabidze, M.
AU  - Tagliente, G.
AU  - Talman, R.
AU  - Thörngren Engblom, P.
AU  - Trinkel, F.
AU  - Uzikov, Yu.
AU  - Valdau, Yu.
AU  - Valetov, E.
AU  - Vassiliev, A.
AU  - Weidemann, C.
AU  - Wrońska, A.
AU  - Wüstner, P.
AU  - Zuprański, P.
AU  - Żurek, M.
TI  - Phase Locking the Spin Precession in a Storage Ring
JO  - Physical review letters
VL  - 119
IS  - 1
SN  - 1079-7114
CY  - College Park, Md.
PB  - APS
M1  - FZJ-2017-04486
SP  - 014801
PY  - 2017
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000418530600001
C6  - pmid:28731757
DO  - DOI:10.1103/PhysRevLett.119.014801
UR  - https://juser.fz-juelich.de/record/834558
ER  -

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