Design and characterization of a neutralized-transport experiment for heavy-ion fusion

Henestroza, E.; Eylon, S.; Roy, P.K.; Yu, S.S.; Anders, André; Bieniosek, F.M.; Greenway, W.; Logan, B.G.; MacGill, R.A.; Shuman, D.; Vanecek, D.; Waldron, W.L.; Sharp, W.M.; Houck, T.; Davidson, Ronald C.; Efthimion, P. C.; Gilson, Erik; Sefkow, A. B.; Welch, D. R.; Rose, D. V.; Olson, Craig

doi:10.1103/physrevstab.7.083501

Cited by 35 publications

(11 citation statements)

References 28 publications

(28 reference statements)

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“…Neutralized transport experiment (NTX): The NTX experiment was designed, characterized, and is being run with the support of simulations [19,20]. The NTX beam, from source through the final optic, was simulated with WARP to explore the variation of the converging beam properties upon the quadrupole strengths.…”

Section: Article In Pressmentioning

confidence: 99%

Simulation of intense beams for Heavy Ion Fusion

Friedman

2005

Nuclear Instruments and Methods in Physics Research Section A:

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Computer simulations of intense ion beams play a key role in the Heavy Ion Fusion research program. Along with analytic theory, they are used to develop future experiments, guide ongoing experiments, and aid in the analysis and interpretation of experimental results. They also afford access to regimes not yet accessible in the experimental program. The U.S. Heavy Ion Fusion Virtual National Laboratory and its collaborators have developed state-of-the art computational tools, related both to codes used for stationary plasmas and to codes used for traditional accelerator applications, but necessarily differing from each in important respects. These tools model beams in varying levels of detail and at widely varying computational cost. They include moment models (envelope equations and fluid descriptions), particle-in-cell methods (electrostatic and electromagnetic), nonlinear-perturbative descriptions (''df ''), and continuum Vlasov methods. Increasingly, it is becoming clear that it is necessary to simulate not just the beams themselves, but also the environment in which they exist, be it an intentionally created plasma or an unwanted cloud of electrons and gas. In this paper, examples of the application of simulation tools to intense ion beam physics are presented, including support of present-day experiments, fundamental beam physics studies, and the development of future experiments. Throughout, new computational models are described and their utility explained. These include Mesh Refinement (and its dynamic variant, Adaptive Mesh Refinement); improved electron cloud and gas models, and an electron advance scheme that allows use of larger time steps; and moving-mesh and adaptive-mesh Vlasov methods. r

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Section: Article In Pressmentioning

confidence: 99%

Simulation of intense beams for Heavy Ion Fusion

Friedman

2005

Nuclear Instruments and Methods in Physics Research Section A:

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“…The modeling shows that the compression achieved to date has been limited by known tilt waveform errors that can be further reduced; an improved pulser is planned. Combined compression and focusing: For both WDM and IFE applications, to be focused the beam must be neutralized as it passes through the target chamber and onto the target; this was studied in the earlier Neutralized Transport Experiment (NTX), and with simulations [9,10]. Experiments exploring the combination of neutralized drift compression and transverse focusing are planned for the near future.…”

Section: Hifs-vnl Beam Experiments a Neutralized Compression Andmentioning

confidence: 99%

Overview of theory and simulations in the Heavy Ion Fusion Science Virtual National Laboratory

Friedman

2007

Nuclear Instruments and Methods in Physics Research Section A:

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The Heavy Ion Fusion Science Virtual National Laboratory (HIFS-VNL) is a collaboration of Lawrence Berkeley National Laboratory, Lawrence Livermore National Laboratory, and Princeton Plasma Physics Laboratory. These laboratories, in cooperation with researchers at other institutions, are carrying out a coordinated effort to apply intense ion beams as drivers for studies of the physics of matter at extreme conditions, and ultimately for inertial fusion energy. Progress on this endeavor depends upon coordinated application of experiments, theory, and simulations. This paper describes the state of the art, with an emphasis on the coordination of modeling and experiment; developments in the simulation tools, and in the methods that underly them, are also treated.

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“…Significant technical progress has been made in the transverse compression and focusing of intense ion beams in the Neutralized Transport Experiment (NTX) [38,40]. In NTX, an unneutralized ion beam pulse passes through a finite-length plasma (plasma plug).…”

Section: Iiia Neutralized Transport Experimentsmentioning

confidence: 99%

“…Simulations and analysis have also been carried out [33 -35] in support of the Neutralized Drift Compression Experiment (NDCX) described in Sec. III, and neutralized transverse focusing has been studied in simulations for the general case [36] and for experiments in the Neutralized Transport Experiment (NTX) [37,38] described in Sec. III.…”

Section: Iid Studies Of Beam Compression and Focusingmentioning

confidence: 99%

“…For fusion energy applications, either un-neutralized [29 -31] or neutralized [32][33][34][35][36][37][38][39] compression may be considered. In the un-neutralized case, to describe the drift compression dynamics and the final focus of the beam particles to a common axial plane and prescribed focal spot size, a warm-fluid model has been employed to describe the longitudinal dynamics of drift compression, coupled nonlinearly to envelope equations that describe the self-consistent transverse dynamics and focusing of the ion beam as it propagates through the quadrupole focusing lattice [30,31].…”

Section: Iid Studies Of Beam Compression and Focusingmentioning

confidence: 99%

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