2D-Oide effect

Abstract : The Oide e ect considers the synchrotron radiation in the nal focusing quadrupole and it sets a lower limit on the vertical beam size at the Interaction Point, particularly relevant for high energy linear colliders. The theory of the Oide effect was derived considering only the radiation in the focusing plane of the magnet. This article addresses the theoretical calculation of the radiation effect on the beam size considering both focusing and defocusing planes of the quadrupole, refered to as 2D-Oide. The CLIC 3 TeV final quadrupole (QD0) and beam parameters are used to compare the theoretical results from the Oide effect and the 2D-Oide effect with particle tracking in PLACET. The 2D-oide demonstrates to be important as it increases by 17% the contribution to the beam size. Further insight into the aberrations induced by the synchrotron radiation opens the possibility to partially correct the 2D-Oide effect with octupole magnets. A beam size reduction of 4% is achieved in the simplest configuration, using a single octupole.
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Preprints, Working Papers, ...
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http://hal.in2p3.fr/in2p3-01202533
Contributor : Sabine Starita <>
Submitted on : Monday, September 21, 2015 - 11:54:51 AM
Last modification on : Thursday, January 11, 2018 - 6:14:21 AM

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  • HAL Id : in2p3-01202533, version 1
  • ARXIV : 1509.05747

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O.R. Blanco, R. Tomas, P. Bambade. 2D-Oide effect. 2015. ⟨in2p3-01202533⟩

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