Phys. Rev. ST Accel. Beams 11, 054201 (2008) [5 pages]

Correction of nonlinear distortion in high-transverse-emittance ratio-beam production with linear accelerator

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Shaoheng Wang
LSU/CAMD, Louisiana State University, Center for Advanced Microstructures & Devices, 6980 Jefferson Highway, Baton Rouge, Louisiana 70806, USA

Received 3 January 2008; published 2 May 2008

Derbenev proposed producing a high quality flat beam of high-transverse-emittance ratio (HTER) with a linear accelerator. Kim also discussed the round-to-flat transformation of angular-momentum-dominated beam. Fermilab/NICADD Photoinjector Laboratory has performed many experiments on HTER beam production. Experiments and simulations, collectively, showed an S-shaped transverse distribution in the flat beam. In this paper, the source of this emittance deterioration in the transformation is identified as the nonlinear rf cavity focusing force; and a solution is proposed.


©2008 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevSTAB.11.054201
DOI: 10.1103/PhysRevSTAB.11.054201
PACS: 29.27.−a, 41.85.−p, 41.75.Fr, 41.75.Lx

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