RF depolarizing resonances in the presence of a full Siberian snake and full snake spin-flipping

Details RF depolarizing resonances in the presence of a full Siberian snake and full snake spin-flipping RF depolarizing resonances in the presence of a full Siberian snake and full snake spin-flipping

2003-04-18

arxiv.org/abs/physics/0304066v1

Physics

Accelerator Physics

Ph. D. Thesis, 69 pages

Scientific paper

Frequent polarization reversals, or spin-flips, of a stored polarized beam in a high energy scattering asymmetry experiments may greatly reduce systematic errors of spin asymmetry measurements. A spin-flipping technique is being developed by using rf magnets running at a frequency close to the spin precession frequency, thereby creating spin-depolarizing resonances; the spin can then be flipped by ramping the rf magnet's frequency through the resonance. We studied, at the Indiana University Cyclotron Facility Cooler Ring, properties of such rf depolarizing resonances in the presence of a nearly-full Siberian snake and their possible application for spin-flipping. By using an rf-solenoid magnet, we reached a 98.7% efficiency of spin-flipping. However, an rf-dipole magnet is more practical at high energies; hence, studies of spin-flipping by an rf-dipole are underway at IUCF.

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