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Experiments with space-charge-dominated beams for heavy ion fusion applications

  • P.G. O'SHEA (a1), R.A. KISHEK (a1), M. REISER (a1), B. BEAUDOIN (a1), S. BERNAL (a1), Y. CUI (a1), A. DIEP (a1), D. FELDMAN (a1), M. GLANZER (a1), T.F. GODLOVE (a1), I. HABER (a1), J. HARRIS (a1), H. LI (a1), J. NEUMANN (a1), B. QUINN (a1), M. QURIUS (a1), M. SNOWEL (a1), A. VALFELLS (a1), M. VIRGO (a1), M. WALTER (a1), R. YUN (a1) and Y. ZOU (a1)...


A detailed understanding of the physics of space-charge-dominated beams is vital in the design of heavy ion inertial fusion (HIF) drivers. In that regard, low-energy, high-intensity electron beams provide an excellent model system. The University of Maryland Electron Ring (UMER), currently being installed, has been designed to study the physics of space-charge-dominated beams with extreme intensity in a strong focusing lattice with dispersion. At 10 keV and 100 mA, the beam from the UMER injector has a generalized perveance as much as 0.0015, corresponding to that of proposed HIF drivers. Though compact (11 m in circumference), UMER will be a very complex device by the time of its completion (expected 2003). We present an update on the construction as well as recent experimental results.


Corresponding author

Address correspondence and reprint requests to: P.G. O'Shea, Institute for Research in Electronics and Applied Physics, University of Maryland, College Park, MD 20742-3511, USA. E-mail:



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