Phase measurement for driven spin oscillations in a storage ring

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Title
Phase measurement for driven spin oscillations in a storage ring
Author(s)
Hempelmann, N; Hejny, V; Pretz, J; Soltner, H; Augustyniak, W; Bagdasarian, Z; Bai, M; Barion, L; Berz, M; Chekmenev, S; Ciullo, G; Dymov, S; M. Gaisser; Eversmann, D; Gebel, R; Grigoryev, K; Grzonka, D; Guidoboni, G; Heberling, D; Hetzel, J; Hinder, F; Kacharava, A; Kamerdzhiev, V; Keshelashvili, I; Koop, I; Kulikov, A; Lehrach, A; Lenisa, P; Lomidze, N; Lorentz, B; Maanen, P; Macharashvili, G; Magiera, A; Mchedlishvili, D; Mey, S; Muller, F; Nass, A; Nikolaev, NN; Nioradze, M; Pesce, A; Prasuhn, D; Rathmann, F; Rosenthal, M; Saleev, A; Schmidt, V; Yannis K. Semertzidis; Senichev, Y; Shmakova, V; Silenko, A; Slim, J; Stahl, A; Stassen, R; Stephenson, E; Stockhorst, H; Stroher, H; Tabidze, M; Tagliente, G; Talman, R; Engblom, PT; Trinkel, F; Uzikov, Y; Valdau, Y; Valetov, E; Vassiliev, A; Weidemann, C; Wronska, A; Wustner, P; Zupranski, P; Zurek, M
Publication Date
2018-04
Journal
Physical Review Accelerators and Beams, v.21, no.4, pp.042002 -
Publisher
AMER PHYSICAL SOC
Abstract
This paper reports the first simultaneous measurement of the horizontal and vertical components of the polarization vector in a storage ring under the influence of a radio frequency (rf) solenoid. The experiments were performed at the Cooler Synchrotron COSY in Julich using a vector polarized, bunched 0.97 GeV/c deuteron beam. Using the new spin feedback system, we set the initial phase difference between the solenoid field and the precession of the polarization vector to a predefined value. The feedback system was then switched off, allowing the phase difference to change over time, and the solenoid was switched on to rotate the polarization vector. We observed an oscillation of the vertical polarization component and the phase difference. The oscillations can be described using an analytical model. The results of this experiment also apply to other rf devices with horizontal magnetic fields, such as Wien filters. The precise manipulation of particle spins in storage rings is a prerequisite for measuring the electric dipole moment (EDM) of charged particles.
URI
https://pr.ibs.re.kr/handle/8788114/4575
ISSN
2469-9888
Appears in Collections:
Center for Axion and Precision Physics Research(액시온 및 극한상호작용 연구단) > Journal Papers (저널논문)
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