Speaker
Description
Our work focuses on estimating the spin-polarization in high-energy electron/positron storage rings in machines like EIC, FCC-ee and CEPC.
We report on an approach to this problem where spin and orbit motion are modeled by the recently discovered system of stochastic ODEs () in the Lab Frame. This captures key effects like radiative depolarization,
Sokolov-Ternov effect, Baier-Katkov effect, kinetic polarization effect and intrabeam scattering effect. This work is focused on analyzing the poorly understood correction terms to the Derbenev-Kondratenko formula for the radiative depolarization time. These correction terms describe the so-called uncorrelated resonance crossings which were proposed by Derbenev and Kondratenko in the early 1970s shortly after they proposed the Derbenev-Kondratenko formula. They are of special interest for circular colliders with very high electron energies like the FCC-ee and the CEPC.
This work includes transforming the system of stochastic ODEs in from the Cartesian lab frame coordinates to accelerator coordinates as summarized for the orbital motion in the Handbook article by Ellison, Heinemann and Mais **.
Footnotes
- K. Heinemann, D. Appelo, D.P. Barber, O. Beznosov, J.A. Ellison, Int. Journal of Mod. Phys. A, Vol. 34, 1942032 (2019). See also: arXiv:2101.08955 [physics.acc-ph]
** Jim Ellison, K. Heinemann, H. Mais. Handbook of Accelerator Physics and Engineering (Third Edition, 2023), pp. 109-113.
Funding Agency
Supported by U.S. Department of Energy, Office of Science, under Award Numbers
DE-SC0018008 and DE-SC0025476
| Region represented | America |
|---|---|
| Paper preparation format | LaTeX |
