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Angular Momentum Dynamics of Vortex Particles in Accelerators.

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Vortex beams with orbital angular momentum (OAM) offer enhanced magnetic moments for particle collisions. Their OAM dynamics are stable during acceleration, enabling new experimental observables.

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Area of Science:

  • Particle physics
  • Accelerator physics
  • Quantum optics

Background:

  • Conventional experiments use plane-wave states, limiting achievable magnetic moments.
  • Vortex beams possess orbital angular momentum (OAM), offering potentially larger magnetic moments.
  • OAM beams could enable new high-energy collision observables.

Purpose of the Study:

  • Investigate radiative and nonradiative OAM dynamics for relativistic vortex particles.
  • Determine the stability of OAM during particle acceleration.
  • Explore OAM manipulation techniques for future experiments.

Main Methods:

  • Theoretical analysis of radiative OAM loss via photon emission.
  • Modeling of nonradiative OAM dynamics, including precession frequencies.
  • Comparison of OAM dynamics with spin dynamics in accelerators.

Main Results:

  • The timescale for OAM loss via photon emission is significantly longer than typical acceleration times.
  • Nonradiative OAM dynamics are governed by precession at a distinct frequency from spin.
  • OAM resonances can disrupt particle beams at lower energies than spin resonances.

Conclusions:

  • Vortex beams are stable for acceleration in linacs.
  • Siberian snakes can be adapted for OAM manipulation.
  • OAM beams offer a promising avenue for exploring new physics in high-energy collisions.