Polarized proton collisions at 205 GeV at RHIC

The Brookhaven Relativistic Heavy Ion Collider (RHIC) has been providing collisions of polarized protons at a beam energy of 100 GeV since 2001. Equipped with two full Siberian snakes in each ring, polarization is preserved during acceleration from injection to 100 GeV. However, the intrinsic spin r...

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Veröffentlicht in:	Physical review letters 2006-05, Vol.96 (17), p.174801-174801, Article 174801
Hauptverfasser:	Bai, M, Roser, T, Ahrens, L, Alekseev, I G, Alessi, J, Beebe-Wang, J, Blaskiewicz, M, Bravar, A, Brennan, J M, Bruno, D, Bunce, G, Courant, E, Drees, A, Fischer, W, Gardner, C, Gill, R, Glenn, J, Haeberli, W, Huang, H, Jinnouchi, O, Kewisch, J, Luccio, A, Luo, Y, Nakagawa, I, Okada, H, Pilat, F, Mackay, W W, Makdisi, Y, Montag, C, Ptitsyn, V, Satogata, T, Stephenson, E, Svirida, D, Tepikian, S, Trbojevic, D, Tsoupas, N, Wise, T, Zelenski, A, Zeno, K, Zhang, S Y
Format:	Artikel
Sprache:	eng
Schlagworte:	BEAM INJECTION BROOKHAVEN RHIC COLLISIONS GEV RANGE 100-1000 HEAVY ION REACTIONS NUCLEAR PHYSICS AND RADIATION PHYSICS POLARIZATION POLARIZED BEAMS PROTON BEAMS PROTON-PROTON INTERACTIONS PROTONS RESONANCE SPIN
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Zusammenfassung:	The Brookhaven Relativistic Heavy Ion Collider (RHIC) has been providing collisions of polarized protons at a beam energy of 100 GeV since 2001. Equipped with two full Siberian snakes in each ring, polarization is preserved during acceleration from injection to 100 GeV. However, the intrinsic spin resonances beyond 100 GeV are about a factor of 2 stronger than those below 100 GeV making it important to examine the impact of these strong intrinsic spin resonances on polarization survival and the tolerance for vertical orbit distortions. Polarized protons were first accelerated to the record energy of 205 GeV in RHIC with a significant polarization measured at top energy in 2005. This Letter presents the results and discusses the sensitivity of the polarization survival to orbit distortions.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.96.174801