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Phys. Rev. ST Accel. Beams 8, 010101 (2005) [13 pages]

2-MV electrostatic quadrupole injector for heavy-ion fusion

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F. M. Bieniosek, C. M. Celata, E. Henestroza, J. W. Kwan, L. Prost, and P. A. Seidl
Lawrence Berkeley National Laboratory and Heavy-Ion Fusion Virtual National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, USA

A. Friedman, D. P. Grote, and S. M. Lund
Lawrence Livermore National Laboratory and Heavy-Ion Fusion Virtual National Laboratory, P.O. Box 808, Livermore, California 94550, USA

I. Haber
Institute for Research in Electronics and Applied Physics, University of Maryland, College Park, Maryland 20742, USA

Received 11 November 2004; published 19 January 2005

High current and low emittance are principal requirements for heavy-ion injection into a linac driver for inertial fusion energy. An electrostatic quadrupole injector is capable of providing these high charge density and low emittance beams. We have modified the existing 2-MV injector to reduce beam emittance and to double the pulse length. We characterize the beam delivered by the modified injector to the High Current Transport Experiment and the effects of finite rise time of the extraction voltage pulse in the diode on the beam head. We demonstrate techniques for mitigating aberrations and reducing beam emittance growth in the injector.


©2005 The American Physical Society

URL: http://link.aps.org/abstract/PRSTAB/v8/e010101
DOI: 10.1103/PhysRevSTAB.8.010101
PACS: 29.17.+w, 29.27.Ac, 41.85.–p, 07.77.Ka

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