Spin decoherence and off-resonance behavior of radiofrequency-driven spin rotations in storage rings
Abstract
Radiofrequency-driven resonant spin rotators are routinely used as standard instruments in polarization experiments in particle and nuclear physics. Maintaining the continuous exact parametric spin-resonance condition of the equality of the spin rotator and the spin precession frequency during operation constitutes one of the challenges. We present a detailed analytic description of the impact of detuning the exact spin resonance on the vertical and the in-plane precessing components of the polarization. An important part of the formalism presented here is the consideration of experimentally relevant spin-decoherence effects. We discuss applications of the developed formalism to the interpretation of the experimental data on the novel pilot bunch approach to control the spin-resonance condition during the operation of the radiofrequency-driven Wien filter that is used as a spin rotator in the first direct deuteron electric dipole moment measurement at COSY. We emphasize the potential importance of the hitherto unexplored phase of the envelope of the horizontal polarization as an indicator of the stability of the radiofrequency-driven spin rotations in storage rings. The work presented here serves as a satellite publication to the work published concurrently on the proof of principle experiment about the so-called pilot bunch approach that was developed to provide co-magnetometry for the deuteron electric dipole moment experiment at COSY.
Keywords
Cite
@article{arxiv.2309.05080,
title = {Spin decoherence and off-resonance behavior of radiofrequency-driven spin rotations in storage rings},
author = {N. N. Nikolaev and F. Rathmann and J. Slim and A. Andres and V. Hejny and A. Nass and A. Kacharava and P. Lenisa and J. Pretz and A. Saleev and V. Shmakova and H. Soltner and F. Abusaif and A. Aggarwal and A. Aksentev and B. Alberdi and L. Barion and I. Bekman and M. Beyß and C. Böhme and B. Breitkreutz and N. Canale and G. Ciullo and S. Dymov and N. -O. Fröhlich and R. Gebel and M. Gaisser and K. Grigoryev and D. Grzonka and J. Hetzel and O. Javakhishvili and V. Kamerdzhiev and S. Karanth and I. Keshelashvili and A. Kononov and K. Laihem and A. Lehrach and N. Lomidze and B. Lorentz and G. Macharashvili and A. Magiera and D. Mchedlishvili and A. Melnikov and F. Müller and A. Pesce and V. Poncza and D. Prasuhn and D. Shergelashvili and N. Shurkhno and S. Siddique and A. Silenko and S. Stassen and E. J. Stephenson and H. Ströher and M. Tabidze and G. Tagliente and Y. Valdau and M. Vitz and T. Wagner and A. Wirzba and A. Wrońska and P. Wüstner and M. Żurek},
journal= {arXiv preprint arXiv:2309.05080},
year = {2023}
}
Comments
31 pages, 10 figures, 5 tables