RF Cell Modeling and Experiments for Wakefield Minimization in DARHT-II

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dc.creatorNelson, Scott D.
dc.creatorVella, Michael
dc.date2000-08-17
dc.date2000-08-21
dc.date.accessioned2026-07-07T05:44:31Z
dc.date.available2026-07-07T05:44:31Z
dc.descriptionElectron beams of linear induction accelerators experience deflective forces caused by RF fields building up as a result of accelerating cavities of finite size. These forces can significantly effect the beam when a long linac composed of identical cells is assembled. Recent techniques in computational modeling, simulation, and experiments for 20 MeV DARHT-II (Dual Axis Radiographic Hydrodynamic Test) accelerator cells were found to reduce the wakefield impedance of the cells from 800 ohms/meter to 350 ohms/meter and experimental results confirm the results of the modeling efforts. Increased performance of the cell was obtained through a parametric study of the accelerator structure, materials, material tuning, and geometry. As a result of this effort, it was found that thickness-tuned ferrite produced a 50% deduction in the wakefield impedance in the low frequency band and was easily tunable based on the material thickness. It was also found that shaped metal sections allow for high-Q resonances to be de-tuned, thus decreasing the amplitude of the resonance and increasing the cell s performance. For the geometries used for this cell, a roughly 45 degree angle had the best performance in affecting the wakefield modes.
dc.descriptionLINAC2000 TUB09
dc.identifierhttps://arxiv.org/abs/physics/0008099
dc.identifierhttp://arxiv.org/abs/physics/0008099
dc.identifiereConf C000821 (2000) TUB09
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/83665
dc.subjectAccelerator Physics
dc.titleRF Cell Modeling and Experiments for Wakefield Minimization in DARHT-II
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