Phase Measurement for Driven Spin Oscillations in a Storage Ring
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 J\"ulich using a vector polarized, bunched 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.
Cite
@article{arxiv.1801.03445,
title = {Phase Measurement for Driven Spin Oscillations in a Storage Ring},
author = {N. Hempelmann and V. Hejny and J. Pretz and H. Soltner and W. Augustyniak and Z. Bagdasarian and M. Bai and L. Barion and M. Berz and S. Chekmenev and G. Ciullo and S. Dymov and D. Eversmann and M. Gaisser and R. Gebel and K. Grigoryev and D. Grzonka and G. Guidoboni and D. Heberling and J. Hetzel and F. Hinder and A. Kacharava and V. Kamerdzhiev and I. Keshelashvili and I. Koop and A. Kulikov and A. Lehrach and P. Lenisa and N. Lomidze and B. Lorentz and P. Maanen and G. Macharashvili and A. Magiera and D. Mchedlishvili and S. Mey and F. Müller and A. Nass and N. N. Nikolaev and M. Nioradze and A. Pesce and D. Prasuhn and F. Rathmann and M. Rosenthal and A. Saleev and V. Schmidt and Y. Semertzidis and Y. Senichev V. Shmakova and A. Silenko and J. Slim and A. Stahl and R. Stassen and E. Stephenson and H. Stockhorst and H. Ströher and M. Tabidze and G. Tagliente and R. Talman and P. Thörngren Engblom and F. Trinkel and Yu. Uzikov and Yu. Valdau and E. Valetov and A. Vassiliev and C. Weidemann and A. Wrońska and P. Wüstner and P. Zuprański and M. Żurek},
journal= {arXiv preprint arXiv:1801.03445},
year = {2018}
}