Coupling Measurements in ATF2 Extraction Line

Cécile Rimbault (1) , P. Bambade (1) , S. Kuroda , T. Tauchi , N. Terunuma , G. White (2) , M. Woodley (2)

1 LAL - Laboratoire de l'Accélérateur Linéaire
2 SLAC - SLAC National Accelerator Laboratory

The purpose of ATF2 is to deliver a beam with stable very small spotsizes as required for future linear colliders such as ILC or CLIC. To achieve that, precise controls of the aberrations such as dispersion and coupling are necessary. Theoretically, the complete reconstruction of the beam matrix is possible from the measurements of horizontal, vertical and tilted beam sizes, combining skew quadrupole scans at several wire-scanner positions. Such measurements were performed in the extraction line of ATF2 in May 2009. We present analysis results attempting to resolve the 4X4 beam matrix and discuss the experimental limitations of 4D emittance measurements with wire scanners

Domaines: Physique des accélérateurs [physics.acc-ph]

Cécile Rimbault, P. Bambade, S. Kuroda, T. Tauchi, N. Terunuma, et al.. Coupling Measurements in ATF2 Extraction Line. 1st International Particle Accelerator Conference (IPAC 2010), May 2010, Kyoto, Japan. Joint Accelerator Conferences Website, pp.4467-4469, 2010. ⟨in2p3-00497012⟩