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Akademický článek

Overcoming horizontal depolarizing resonances with multiple tune jumps

Autor: H. Huang, L. A. Ahrens, M. Bai, K. A. Brown, Y. Dutheil, C. Gardner, J. W. Glenn, F. Lin, W. W. MacKay, F. Meot, A. Poblaguev, V. Ranjbar, T. Roser, V. Schoefer, S. Tepikian, N. Tsoupas, K. Yip, A. Zelenski, K. Zeno

Publikováno v: Physical Review Special Topics. Accelerators and Beams, Vol 17, Iss 8, p 081001 (2014)

In a medium energy proton synchrotron, strong enough partial Siberian snakes can be used to avoid both imperfection and vertical intrinsic depolarizing resonances. However, partial snakes tilt the stable spin direction away from vertical, which gener

Externí odkaz: https://doaj.org/article/38e4d86b357645a9926d7c92e7405fbd

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Akademický článek

Improved gold ion stripping at 0.1 and 10 GeV/nucleon for the Relativistic Heavy Ion Collider

Publikováno v: Physical Review Special Topics. Accelerators and Beams, Vol 11, Iss 1, p 011001 (2008)

The four electron stripping stages leading to fully stripped gold ions in the Relativistic Heavy Ion Collider (RHIC) are briefly described. The third stripper, which removes 46 electrons from the Au^{31+} ions leading to heliumlike Au^{77+}, offers t

Externí odkaz: https://doaj.org/article/dafc480ad6804c4db459019ca1bbdb82

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Akademický článek

Exploration of horizontal intrinsic spin resonances with two partial Siberian snakes

Autor: F. Lin, L. A. Ahrens, M. Bai, K. Brown, E. D. Courant, C. Gardner, J. W. Glenn, H. Huang, S. Y. Lee, A. U. Luccio, W. W. MacKay, V. Ptitsyn, T. Roser, J. Takano, S. Tepikian, N. Tsoupas, A. Zelenski, K. Zeno

Publikováno v: Physical Review Special Topics. Accelerators and Beams, Vol 10, Iss 4, p 044001 (2007)

Two partial Siberian snakes were used to avoid all the spin imperfection and vertical intrinsic resonances in the alternating gradient synchrotron (AGS) at Brookhaven National Laboratory. However, the horizontal betatron motion can cause polarization

Externí odkaz: https://doaj.org/article/0af78060de27401db2152ea84de9b5d9

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Akademický článek

Uniform beam distributions at the target of the NASA Space Radiation Laboratory’s beam line

Autor: N. Tsoupas, L. Ahrens, S. Bellavia, R. Bonati, K. A. Brown, I-Hung Chiang, C. J. Gardner, D. Gassner, S. Jao, W. W. Mackay, I. Marneris, W. Meng, D. Phillips, P. Pile, R. Prigl, A. Rusek, L. Snydstrup, K. Zeno

Publikováno v: Physical Review Special Topics. Accelerators and Beams, Vol 10, Iss 2, p 024701 (2007)

Errors in delivering a uniformly distributed radiation dose to biological and material samples exposed to charged particle beams are a significant problem for experimenters. In this paper, we discuss data collected on the uniform beam distributions p

Externí odkaz: https://doaj.org/article/e32cae2a74c74cafafb12163d957301e

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Akademický článek

Overcoming an intrinsic depolarizing resonance with a partial Siberian snake

Autor: H. Huang, L. Ahrens, M. Bai, K. A. Brown, J. W. Glenn, A. U. Luccio, W. W. MacKay, C. Montag, V. Ptitsyn, T. Roser, N. Tsoupas, K. Zeno, V. Ranjbar, H. Spinka, D. Underwood

Publikováno v: Physical Review Special Topics. Accelerators and Beams, Vol 7, Iss 7, p 071001 (2004)

An 11.4% partial Siberian snake was used to successfully accelerate polarized protons through a strong intrinsic depolarizing spin resonance in the Alternating Gradient Synchrotron (AGS). No noticeable depolarization was observed. This opens up the p

Externí odkaz: https://doaj.org/article/c9e001198d384b869625bdb05cf6e12a

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