Long-pulse beam stability experiments on the DARHT-II linear induction accelerator

When completed, the DARHT-II linear induction accelerator (LIA) will produce a 2-kA, 17-MeV electron beam in a 1600-ns flat-top pulse. In initial tests, DARHT-II accelerated beams with current pulse lengths from 500 to 1200 ns full-width at half-maximum (FWHM) with more than 1.2-kA, 12.5-MeV peak cu...

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Bibliographic Details
Published in:IEEE transactions on plasma science 2006-04, Vol.34 (2), p.460-466
Main Authors: Ekdahl, C., Abeyta, E.O., Aragon, P., Archuleta, R., Bartsch, R., Bender, H., Briggs, R., Broste, W., Carlson, C., Chan, K.C.D., Dalmas, D., Eversole, S., Frayer, D., Gallegos, R., Harrison, J., Hughes, T., Jacquez, E., Johnson, D., Johnson, J., McCuistian, B.T., Montoya, N., Mostrom, C., Nath, S., Oro, D., Rowton, L., Sanchez, M., Scarpetti, R., Schauer, M., Schulze, M., Tang, Y., Tipton, A., Tom, C.Y.
Format: Article
Language:English
Subjects:
Accelerated tests
Acceleration
Accelerator measurement systems
Accelerators
Beamforming
Beams (radiation)
Beams (structural)
Charged-particle beams
Current pulses
Dynamics
Electromagnetism
electron and ion optics
Electron accelerators
Electron and positron beams
Electron beams
Electrons
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
induction accelerators
Instability
Ion accelerators
Life estimation
Linear accelerators
Other advanced accelerator concepts
Particle accelerators
Particle beams
Physics
Stability
Testing
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Description
Summary:When completed, the DARHT-II linear induction accelerator (LIA) will produce a 2-kA, 17-MeV electron beam in a 1600-ns flat-top pulse. In initial tests, DARHT-II accelerated beams with current pulse lengths from 500 to 1200 ns full-width at half-maximum (FWHM) with more than 1.2-kA, 12.5-MeV peak current and energy. Experiments have now been done with a /spl sim/1600-ns pulse length. These pulse lengths are all significantly longer than any other multimegaelectronvolt LIA, and they define a novel regime for high-current beam dynamics, especially with regard to beam stability. Although the initial tests demonstrated insignificant beam-breakup instability (BBU), the pulse length was too short to determine whether ion-hose instability would be present toward the end of a long, 1600-ns pulse. The 1600-ns pulse experiments reported here resolved these issues for the long-pulse DARHT-II LIA.
ISSN:0093-3813
1939-9375
DOI:10.1109/TPS.2006.872481