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Studies of the Pulse-Line Accelerator Using a Circuit Model.

DE2005860235

Publication Date	2005
Personal Author	Friedman, A.
Page Count	14
Abstract	This note describes a simple model developed to explore some of the properties of the pulse-line ion accelerator, here represented as a series of lumped elements, in the general parameter regime for the 'NDCX-1d' experiments. The goals of this modeling are: to understand the evolution of various possible input pulses in the presence of dispersive effects and imperfect termination of the line; to examine scenarios for beam acceleration; and to explore the effects of 'beam loading', that is, changes to the voltages along the helical line that result from the interaction of the beam's return current with the 'circuitry' of that line. In Section 1, the model is described and the method of solution outlined; in Section 2, a low-current example of beam acceleration is presented; in Section 3, runs are presented showing the development of beam loading-induced voltages as model pulses are followed; in section 4, the modeling of a higher-current beam under acceleration is presented, and the effects of beam loading quantified; and in section 5, a brief summary of complementary efforts and of plans to extend the modeling is presented.
Keywords	Beam acceleration Voltage Beam loading Pulse-line ion accelerators Circuit models
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Lawrence Livermore National Lab., CA.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200612

Studies of the Pulse-Line Accelerator Using a Circuit Model.

Studies of the Pulse-Line Accelerator Using a Circuit Model.
DE2005860235

Publication Date	2005
Personal Author	Friedman, A.
Page Count	14
Abstract	This note describes a simple model developed to explore some of the properties of the pulse-line ion accelerator, here represented as a series of lumped elements, in the general parameter regime for the 'NDCX-1d' experiments. The goals of this modeling are: to understand the evolution of various possible input pulses in the presence of dispersive effects and imperfect termination of the line; to examine scenarios for beam acceleration; and to explore the effects of 'beam loading', that is, changes to the voltages along the helical line that result from the interaction of the beam's return current with the 'circuitry' of that line. In Section 1, the model is described and the method of solution outlined; in Section 2, a low-current example of beam acceleration is presented; in Section 3, runs are presented showing the development of beam loading-induced voltages as model pulses are followed; in section 4, the modeling of a higher-current beam under acceleration is presented, and the effects of beam loading quantified; and in section 5, a brief summary of complementary efforts and of plans to extend the modeling is presented.
Keywords	Beam acceleration Voltage Beam loading Pulse-line ion accelerators Circuit models
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Lawrence Livermore National Lab., CA.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200612