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Simulation on the Breaking of αx Multiknob Orthogonality in the Presence of Gradient and Coupling Errors and experimental investigation

Abstract : The presence of a tilt of the IP Shintake monitor fringe pattern with respect to the x-y coordinate system of the beam can break the orthogonality in the main σ34 and σ32 waist corrections required to reduce the vertical beam size at IP. Concerning the method of doing αx scan and measuring the vertical beam size to diagnose the IPBSM fringe tilt or residual σ13, one thing should be studied is to check what could break the orthogonality of the αx knob other than σ13 and the IPBSM fringe tilt. In this paper, we report on the simulation study that check for the breaking of orthogonality of the αx knob in the presence of gradient and coupling errors; to what extent this breaking of orthogonality can go; and also the breaking of the orthogonality of the other multiknobs.
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http://hal.in2p3.fr/in2p3-00822959
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Submitted on : Monday, July 29, 2013 - 4:10:50 PM
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Long-term archiving on: : Wednesday, October 30, 2013 - 4:11:31 AM

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  • HAL Id : in2p3-00822959, version 1

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S. Bai, J. Gao, P. Bambade, G.R. White. Simulation on the Breaking of αx Multiknob Orthogonality in the Presence of Gradient and Coupling Errors and experimental investigation. IPAC 13 - 4th International Particle Accelerator Conference, May 2013, Shanghai, China. pp.1919-1921. ⟨in2p3-00822959⟩

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