Measurement and Correction of Cross-Plane Coupling in Transport Lines | Zendy

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Measurement and Correction of Cross-Plane Coupling in Transport Lines

Author(s) -

M. Woodley

Publication year - 2000

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/763856

Subject(s) - thermal emittance , beam emittance , coupling (piping) , beam (structure) , physics , plane (geometry) , optics , luminosity , linear particle accelerator , computational physics , mathematics , geometry , engineering , astrophysics , mechanical engineering , galaxy

In future linear colliders the luminosity will depend on maintaining thesmall emittance aspect ratio delivered by damping rings. Correction ofcross-plane coupling can be important in preventing dilution of the beamemittance. In order to minimize the vertical emittance, especially for a flatbeam, it is necessary to remove all cross-plane (x-y) correlations. This paperstudies emittance measurement and correction for coupled beams in the presenceof realistic measurement errors. The results of simulations show thatreconstruction of the full 4x4 beam matrix can be misleading in the presence oferrors. We suggest more robust tuning procedures for minimizing linearcoupling.

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