The AMOS (azimuthal mode simulator) code

DeFord, J.F.; Craig, G.D.; McLeod, Robert R.

doi:10.1109/pac.1989.73388

Cited by 15 publications

(5 citation statements)

References 4 publications

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“…If the units of the pipe radius (b) and accelerating gap (d) are in centimeter, the coupling impedance (Z ) has the units of Ohm/centimeter. In practice, this form is fit to the experimental data, such as in [22], or to the results of an electromagnetic code, such as AMOS [32]. In what follows, we fit the function to the experimental data, using the DARHT-I data, since we propose to replicate the DARHT-I cavity geometry [6], [7].…”

Section: B Bbu Algorithmmentioning

confidence: 99%

Beam Breakup in an Advanced Linear Induction Accelerator

Ekdahl

Coleman

McCuistian

2016

IEEE Trans. Plasma Sci.

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Two linear induction accelerators (LIAs) have been in operation for a number of years at the Los Alamos Dual Axis Radiographic Hydrodynamic Test (DARHT) facility. A new multipulse LIA is being developed. We have computationally investigated the beam breakup (BBU) instability in this advanced LIA. In particular, we have explored the consequences of the choice of beam injector energy and the grouping of LIA cells. We find that within the limited range of options presently under consideration for the LIA architecture, there is little adverse effect on the BBU growth. The computational tool that we used for this investigation was the beam dynamics code linear accelerator model for DARHT (LAMDA). To confirm that LAMDA was appropriate for this task, we first validated it through comparisons with the experimental BBU data acquired on the DARHT accelerators. Index Terms-Electron beam instabilities, linear induction accelerators (LIAs).

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Section: B Bbu Algorithmmentioning

confidence: 99%

Beam Breakup in an Advanced Linear Induction Accelerator

Ekdahl

Coleman

McCuistian

2016

IEEE Trans. Plasma Sci.

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“…One way to obtain the necessary dependence of impedance on gap-width would be to use a reliable code, such as AMOS [23], to calculate the DARHT-1 transverse impedance with different gap widths. From these results, the accurate scaling of Z ⊥ with gap size g can be deduced.…”

Section: Discussionmentioning

confidence: 99%

Scaling of induction-cell transverse impedance: effect on accelerator design

Ekdahl¹

2016

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“…In order to quantify the RF effects on the beam, AMOS 2.5-D finite difference time domain [4] calculations were performed to examine the wakefield impedance of the structure even though the DWA structure is a purely 3D structure. To include the 3D geometry, the effective impedance of the DWA structure was used in the RF simulations.…”

Section: Beam Breakup Instabilitymentioning

confidence: 99%

A Compact x-ray Radiography Accelerator Using High-Gradient Vacuum Insulator Technology

Chen

McCarrick

Nelson

2006

2006 International Symposium on Discharges and Electrical Insulation in Vacuum

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Using the high-gradient vacuum dielectric wall accelerator technology, we are developing a compact induction accelerator system primarily intended for pulsed x-ray radiography. The accelerator would provide a 2-kA beam for a 20-30 ns flat-top. The design goal is to generate a 2-mm diameter x-ray source. We have two physics designs of the system from the injector to the x-ray converter for two different final energies (8 MeV and 20 MeV). The design goal for the 8-MeV system is to generate 10-rad of x-ray, and the design goal for the 20-MeV system is to generate 300-rad of x-ray. We will present our modeling results and discuss the beam physics in the system. We will also present the predicted spot sizes and the on-axis x-ray doses for both energies.

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The AMOS (azimuthal mode simulator) code

Cited by 15 publications

References 4 publications

Beam Breakup in an Advanced Linear Induction Accelerator

Beam Breakup in an Advanced Linear Induction Accelerator

Scaling of induction-cell transverse impedance: effect on accelerator design

A Compact x-ray Radiography Accelerator Using High-Gradient Vacuum Insulator Technology

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