Optimization of Electrostatic Quadrupole Profile to Reduce Image Charge Effects

Abstract

Vertical electric fields need to remain orders of magnitude smaller than the horizontal electric field in storage ring electric dipole moment experiments. Otherwise, the coupling with the magnetic dipole moment dominates the spin precession, eventually leading to a false signal. This work presents first quantitative studies regarding electrostatic quadrupole profile optimization, which helps suppressing image beam induced vertical electric fields. Besides the demonstration of the profile optimization, its suppression performance is also studied for various beam offsets and beam size configurations. It is found that with the optimum profile, the vertical electric field can be reduced by two orders of magnitude.

arXiv comment6 pages, 7 figures

References in corpus (5)

• A Storage Ring Experiment to Detect a Proton Electric Dipole Moment
• Derivation of Generalized Thomas-Bargmann-Michel-Telegdi Equation for a Particle with Electric Dipole Moment
• Storage Ring to Search for Electric Dipole Moments of Charged Particles -- Feasibility Study
• Sensitive Search for a Permanent Muon Electric Dipole Moment
• Real-time sextupole tuning for a long in-plane polarization at storage rings