Beam Stability Experiments on DARHT-II
Abstract
When completed, the DARHT-II linear induction accelerator (LIA) will produce a 2-kA, 18-MeV electron beam with more than 1500-ns current/energy flat-top. In initial tests DARHT-II has already accelerated beams with current pulse lengths from 500-ns to 1200-ns full-width at half maximum (FWHM) with more than 1.2-kA, 12.5-MeV peak current and energy. New experiments are planned with a approximately 1600-ns pulse length, but with reduced current and energy. These pulse lengths are all significantly longer than any other multi-MeV LIA, and they define a novel regime for high-current beam dynamics, especially with regard to beam stability. Although the initial tests demonstrated absence of BBU, the pulse length was too short to determine whether ion-hose instability would be present toward the end of a pulse longer than 1500-ns. The 1600-ns pulse experiments are designed to resolve these and other beam-dynamics issues with a long-pulse beam.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 2005
- Accession Number
- ADA634776
Entities
People
- Carl Ekdahl
- D. Dalmas
- E. O. Abeyta
- J. Harrison
- K. C. Chan
- L. Caudill
- P. Aragon
- R. Bartsch
- R. Gallegos
- S. Eversole
Organizations
- Los Alamos National Laboratory