Beam Physics for the 12 GeV Cebaf Upgrade Project

Author

Benesch, J. ; Bogacz, A. ; Chao, Y. ; Freyberger, A. ; Grames, J. ; Harwood, L. ; Kazimi, R. ; Krafft, G.A. ; Merminga, L. ; Spata, M. ; Tiefenback, M. ; Wiseman, M. ; Yunn, B. ; Zhang, Y.

Author_Institution

Jefferson Lab, Newport News, VA 23606, U.S.A.

fYear

2005

fDate

16-20 May 2005

Firstpage

1482

Lastpage

1484

Abstract

Beam physics aspects of the 12 GeV Upgrade of CEBAF are presented. The CEBAF Upgrade to 12 GeV is achieved via 5.5 recirculations through the linacs, and the installation of 10 new high-gradient cryomodules. A new experimental hall, Hall D, is envisioned at the end of the North Linac. Simulation results for a straight-ahead and a recirculated injector are summarized and compared. Beam transport designs are discussed and evaluated with respect to matching and beam breakup (BBU) optimization. Effects of synchrotron radiation excitation on the beam properties are calculated. BBU simulations and derived specifications for the damping of higher order modes of the new 7-cell cavities are presented. The energies that provide longitudinal polarization in multiple experimental halls simultaneously are calculated. Finally, detailed optics of the Hall D transport line has been obtained.

Keywords

Chaos; Damping; Design optimization; Electron accelerators; Electron beams; Electron optics; Linear accelerators; Optical polarization; Physics; Synchrotron radiation;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2005. PAC 2005. Proceedings of the

Print_ISBN

0-7803-8859-3

Type

conf

DOI

10.1109/PAC.2005.1590807

Filename

1590807