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23 April 2024

» pubmed » pmid12906421

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Observation of higher-order snake resonances in polarized proton acceleration in RHIC
V H Ranjbar ; S Y Lee ; H Huang ; A U Luccio ; W W MacKay ; V Ptitsyn ; T Roser ; S Tepikian ;
Date:	18 Jul 2003
Journal:	Phys Rev Lett, 91 (3), 034801
Abstract:	Higher-order and coupled snake resonances were observed during the 2002 polarized proton run in RHIC. Strong depolarization was observed when the fractional part of the vertical betatron tune approached 1/4, and when the fractional part of the horizontal tune approached 3/14. Because of the closed orbit error, each snake resonance splits into two. From the width of the observed snake resonances, we can derive the strength of the imperfection spin resonance. Our results appear consistent with the measured closed orbit error.
Source:	PubMed, pmid12906421
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