Phase measurement for driven spin oscillations in a storage ring

Autor: N. Hempelmann, V. Hejny, J. Pretz, H. Soltner, W. Augustyniak, Z. Bagdasarian, M. Bai, L. Barion, M. Berz, S. Chekmenev, G. Ciullo, S. Dymov, D. Eversmann, M. Gaisser, R. Gebel, K. Grigoryev, D. Grzonka, G. Guidoboni, D. Heberling, J. Hetzel, F. Hinder, A. Kacharava, V. Kamerdzhiev, I. Keshelashvili, I. Koop, A. Kulikov, A. Lehrach, P. Lenisa, N. Lomidze, B. Lorentz, P. Maanen, G. Macharashvili, A. Magiera, D. Mchedlishvili, S. Mey, F. Müller, A. Nass, N. N. Nikolaev, M. Nioradze, A. Pesce, D. Prasuhn, F. Rathmann, M. Rosenthal, A. Saleev, V. Schmidt, Y. Semertzidis, Y. Senichev, V. Shmakova, A. Silenko, J. Slim, A. Stahl, R. Stassen, E. Stephenson, H. Stockhorst, H. Ströher, M. Tabidze, G. Tagliente, R. Talman, P. Thörngren Engblom, F. Trinkel, Yu. Uzikov, Yu. Valdau, E. Valetov, A. Vassiliev, C. Weidemann, A. Wrońska, P. Wüstner, P. Zuprański, M. Żurek
Jazyk: angličtina
Rok vydání: 2018
Předmět:
Zdroj: Physical Review Accelerators and Beams, Vol 21, Iss 4, p 042002 (2018)
Druh dokumentu: article
ISSN: 2469-9888
99121433
DOI: 10.1103/PhysRevAccelBeams.21.042002
Popis: 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 Jülich 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.
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