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Mitigating the effects of higher order multipole fields in the magnets of the Accelerator Test Facility 2 at KEK

Abstract : The ATF2 project is the final focus system prototype for ILC and CLIC linear collider projects, with the purpose to reach a 37nm vertical beam size at the interaction point. In the nanometer beam size regime, higher order multipoles in magnets become a crucial point for consideration. The strength and rotation angle of the ATF2 QEA magnets were reconstructed from measurements done in IHEP in the past and compared with more recent ones from KEK. Based on a sensitivity study, we report on the analysis of possible strategies to mitigate the effects of the measured multipoles. A suggestion is given which will benefit the ATF2 present commissioning to reach the nominal beam size, and also to facilitate the implementation of the reduced β optics in the future.
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http://hal.in2p3.fr/in2p3-00732385
Contributor : Sabine Starita <>
Submitted on : Friday, September 14, 2012 - 3:16:45 PM
Last modification on : Saturday, February 27, 2021 - 11:44:02 AM
Long-term archiving on: : Saturday, December 15, 2012 - 3:47:46 AM

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S. Bai, P. Bambade, D. Wang, J. Gao, M. Woodley, et al.. Mitigating the effects of higher order multipole fields in the magnets of the Accelerator Test Facility 2 at KEK. Chinese Physics C, IOP Publishing, 2012, 36, pp.756-760. ⟨10.1088/1674-1137/36/8/013⟩. ⟨in2p3-00732385⟩

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