J. Phys. IV France
Volume 133, June 2006
Page(s) 749 - 751
Publié en ligne 16 juin 2006
Inertial Fusion Sciences and Applications 2005
J.-C. Gauthier, et al.
J. Phys. IV France 133 (2006) 749-751

DOI: 10.1051/jp4:2006133150

Emittance growth and instability induced by space charge effect during final beam bunching in HIF accelerator system

T. Kikuchi1, T. Someya1, S. Kawata1, M. Nakajima2 and K. Horioka1

1  Faculty of Engineering, Utsunomiya University, Utsunomiya 321-8585, Japan
2  Department of Energy Sciences, Tokyo Institute of Technology, Yokohama 226-8502, Japan

Beam dynamics and emittance growth are investigated by using particle-in-cell simulations during a final beam bunching for a driver system of inertial fusion driven by intense heavy ion beams. Space-charge-dominated beams are transported by a transverse confinement lattice with longitudinal compression, and the emittance increases along the longitudinal beam bunching. Dipole oscillations are excited due to the initial displacement of the beam center. The displacement causes the additional emittance growth during the final beam bunching.

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