Abstract
We recently studied spin flipping of a 1.94 GeV/c vertically polarized proton beam at COSY in Jülich, Germany. We swept an rf-dipole's frequency through an rf-induced spin resonance to flip the beam's polarization direction. After determining the resonance's frequency, we varied the dipole's strength, frequency range, and frequency ramp time. At the rf-dipole's maximum strength, and optimum frequency range and ramp time, we measured a spin-flip efficiency of 99.3% ± 0.1%. This result indicates that an rf dipole may allow efficient spin flipping in high energy proton rings.
Original language | English |
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Article number | 024002 |
Pages (from-to) | 34-38 |
Number of pages | 5 |
Journal | Physical Review Special Topics - Accelerators and Beams |
Volume | 7 |
Issue number | 2 |
DOIs | |
State | Published - 2004 |
Externally published | Yes |
Funding
We would like to thank the entire COSY staff for the successful operation of COSY with its injector cyclotron and polarized ion source. We are grateful to B. B. Blinov, A. W. Chao, E. D. Courant, Ya. S. Derbenev, G. Fidecaro, H. Huang, A. M. T. Lin, W. Lorenzon, C. C. Peters, ?>R. A. Phelps, T. Roser, H. Sato, W. Scobel, D. W. Sivers, and others for their help and advice in the earlier stages of this experiment. This research was supported by grants from the U.S. Department of Energy and the German BMBF Ministry.
Funders | Funder number |
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BMBF Ministry | |
U.S. Department of Energy |