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Experimental verification of predicted beam-polarization oscillations near a spin resonance |
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| Authors: | Morozov V S Chao A W Krisch A D Leonova M A Raymond R S Sivers D W Wong V K Garishvili A Gebel R Lehrach A Lorentz B Maier R Prasuhn D Stockhorst H Welsch D Hinterberger F Ulbrich K Schnase A Stephenson E J Brantjes N P M Onderwater C J G da Silva M |
| Affiliation: | Spin Physics Center, University of Michigan, Ann Arbor, Michigan 48109-1040, USA. |
| Abstract: | The Chao matrix formalism allows analytic calculations of a beam's polarization behavior inside a spin resonance. We recently tested its prediction of polarization oscillations occurring in a stored beam of polarized particles near a spin resonance. Using a 1.85 GeV/c polarized deuteron beam stored in the COoler SYnchrotron, we swept a new rf solenoid's frequency rather rapidly through 400 Hz during 100 ms, while varying the distance between the sweep's end frequency and the central frequency of an rf-induced spin resonance. Our measurements of the deuteron's polarization near and inside the resonance agree with the Chao formalism's predicted oscillations. |
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