Russian Team Proposes Compact "Siberian Snake" Design for NICA Collider to Control Proton Polarization
Experts from the Moscow Institute of Physics and Technology and the Joint Institute for Nuclear Research have proposed a compact Siberian snake magnetic field device design for Russia's NICA collider. The device employs a transverse magnetic field, aiming to maintain proton spin direction during acceleration to a maximum of 13.5 GeV and control polarization orientation during experiments. Related numerical simulations of proton polarization show that this design can effectively suppress beam depolarization. Russia's NICA accelerator complex — Moscow Institute of Physics and Technology press office In an accelerator, proton beams travel along a closed orbit, and particle spins precess around a specific rotation axis. When the beam reaches certain energies, spin may resonate with periodic perturbations in the ring structure, causing beam depolarization; without dedicated control measures, the beam polarization state required for experiments would be difficult to maintain.
2026-08-18
