TY  - JOUR
AU  - Thomas, Johannes
AU  - Hützen, Anna
AU  - Lehrach, Andreas
AU  - Pukhov, Alexander
AU  - Ji, Liangliang
AU  - Wu, Yitong
AU  - Geng, Xuesong
AU  - Büscher, Markus
TI  - Scaling laws for the depolarization time of relativistic particle beams in strong fields
JO  - Physical review accelerators and beams
VL  - 23
IS  - 6
SN  - 2469-9888
CY  - College Park, MD
PB  - American Physical Society
M1  - FZJ-2020-04782
SP  - 064401
PY  - 2020
AB  - The acceleration of polarized electrons and protons in strong laser and plasma fields is a very attractive option to obtain polarized beams in the GeV range. We investigate the feasibility of particle acceleration in strong fields without destroying an initial polarization, taking into account all relevant mechanisms that could cause polarization losses, i.e. the spin precession described by the T-BMT equation, the Sokolov-Ternov effect and the Stern-Gerlach force. Scaling laws for the (de-)polarization time caused by these effects reveal that the dominant polarization limiting effect is the rotation of the single particle spins around the local electromagnetic fields. We compare our findings to test-particle simulations for high energetic electrons moving in a homogeneous electric field. For high particle energies the observed depolarization times are in good agreement with the analytically estimated ones.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000537227200001
DO  - DOI:10.1103/PhysRevAccelBeams.23.064401
UR  - https://juser.fz-juelich.de/record/888233
ER  -