Design and modeling of the multibeam injector

Grote, D.P.; Kwan, J.W.; Westenskow, G.

doi:10.1016/j.nima.2007.02.012

Nuclear Instruments and Methods in Physics Research Section A:

2007

DOI: 10.1016/j.nima.2007.02.012

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Design and modeling of the multibeam injector

D.P. Grote

J.W. Kwan

G. Westenskow

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Cited by 4 publications

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“…Studies at Berkeley [14][15][16] of the merging of four ion beams have shown, in fact, that such a concept is viable. In another example, transverse merging of many ( % 100) beams has been explored experimentally [17] and numerically [18] as an approach to generate high-current intense beams as it offers a number of potential advantages over a single-beam injector. We note however, that even though our experiments can be useful for multibeamlet guns exact correspondence is not the goal here due to the differences of the initial beam distribution function.…”

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confidence: 99%

Experimental and numerical study of phase mixing of an intense beam

Stratakis

Kishek

Haber

et al. 2009

Phys. Rev. ST Accel. Beams

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We study, experimentally and numerically, the relaxation of an initially nonuniform intense beam in an alternating-gradient transport line. A nonlinear distribution consisting of five interacting beamlets is created and tracked for longer than seven plasma periods with the help of tomographic phase-space mapping. Emittance growth is initially rapid, but slows down as the nonuniform distribution homogenizes in a few plasma periods. Both growth rates are found to depend on the beam current.

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mentioning

confidence: 99%

Experimental and numerical study of phase mixing of an intense beam

Stratakis

Kishek

Haber

et al. 2009

Phys. Rev. ST Accel. Beams

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Recent US advances in ion-beam-driven high energy density physics and heavy ion fusion

Logan

Bieniosek

Celata

et al. 2007

Nuclear Instruments and Methods in Physics Research Section A:

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During the past two years, significant experimental and theoretical progress has been made in the U.S. heavy ion fusion science program in longitudinal beam compression, ion-beam-driven warm dense matter, beam acceleration, high brightness beam transport, and advanced theory and numerical simulations. Innovations in longitudinal compression of intense ion beams by > 50 X propagating through background plasma enable initial beam target experiments in warm dense matter to begin within the next two years. We are assessing how these new techniques might apply to heavy ion fusion drivers for inertial fusion energy. IntroductionA coordinated heavy ion fusion science program by the Lawrence Berkeley National Laboratory, Lawrence Livermore National Laboratory, and Princeton Plasma Physics Laboratory (the HeavyIon Fusion Science Virtual National Laboratory), together with collaborators at Voss Scientific and Sandia National Laboratories, pursues research on compressing heavy ion beams towards the high intensities required for creating high energy density matter and fusion energy. In previous research, experiments [1] and simulations [2] showed >100X increases in focused beam intensities in the Neutralized Transport Experiment by transverse compression of an intense ion beam propagating through a background plasma to neutralize >90% of the beam space charge. Section 2 describes recent work on longitudinal compression of an intense beam within neutralizing plasma, and in Sec. 3 we describe studies of initial warm dense matter target experiments that can begin in 2008 after transverse and longitudinal beam compression are combined. Progress in testing a novel Pulse Line Ion Accelerator (PLIA) is described in Sec. 4, e-cloud experiments, theory and simulations in Sec 5, advanced injectors in Sec 6, and advanced theory and simulation models in Sec 7. Section 8 discusses potential applications to heavy ion fusion drivers, and conclusions are given in Sec. 9.

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Generalized phase-space tomography for intense beams

et al. 2010

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Tomographic phase-space mapping in an intense particle beam is reviewed. The diagnostic is extended to beams with space-charge by assuming linear forces and is implemented using either solenoidal or quadrupole focusing lattices. The technique is benchmarked against self-consistent simulation and against a direct experimental sampling of phase-space using a pinhole scan. It is demonstrated that tomography can work for time-resolved phase-space mapping and slice emittance measurement. The technique is applied to a series of proof-of-principle tests conducted at the University of Maryland.

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Design and modeling of the multibeam injector

Cited by 4 publications

References 4 publications

Experimental and numerical study of phase mixing of an intense beam

Experimental and numerical study of phase mixing of an intense beam

Recent US advances in ion-beam-driven high energy density physics and heavy ion fusion

Generalized phase-space tomography for intense beams

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