Physics of intense charged-particle beams for heavy-ion inertial fusion

Reiser, M.

doi:10.1016/s0920-3796(96)00461-9

Cited by 8 publications

(4 citation statements)

References 16 publications

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“…The space charge dominated beam can be considered to be so-called ''non-neutral plasmas'' [1,2], and there has been increasing interest in the behavior of the intense ion beam in recent years [3]. Consequently, the study of highcurrent and a space charge dominated beam is crucial issue in HIF [2,4].…”

Section: Introductionmentioning

confidence: 99%

Beam instability induced by space charge oscillation during final beam bunching for heavy ion inertial fusion

Kikuchi

Nakajima

Horioka

et al. 2004

Phys. Rev. ST Accel. Beams

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Beam instability excited by space charge effect is investigated by particle simulations during final beam bunching in heavy ion inertial fusion. The beam current is continuously increased along the beam transport line with longitudinal bunch compression. A transverse particle-in-cell simulation is carried out with a simple model of beam current increase. The multiparticle simulation shows emittance growth accompanied by the restructuring of charge distribution in the interior of the beam. An analytical stability criterion for the high-current beam transport predicts the growth of density fluctuation by the space charge effect. Although results indicate that an abrupt emittance growth is induced by the space charge oscillation at critical tune depression in the final buncher, the increase of emittance can be estimated as high as 23% at the worst case during the bunching process.

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Section: Introductionmentioning

confidence: 99%

Beam instability induced by space charge oscillation during final beam bunching for heavy ion inertial fusion

Kikuchi

Nakajima

Horioka

et al. 2004

Phys. Rev. ST Accel. Beams

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“…All of the heavy ion inertial fusion (HIF) concepts require beam compression from long pulse (∼100 ns) to short pulse (∼10 ns) at the final stage of the driver system [1,2]. Induction voltage modulators, which have a precise waveform controllability and repetition capability of a few MHz, have recently been developed [2,3].…”

mentioning

confidence: 99%

A Concept of Quasi-Equilibrium, Recirculating Bunch Compressor for Heavy Ion Fusion.

Kikuchi

Nakajima

Horioka

2002

J. Plasma Fusion Res.

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A quasi-equilibrium and recirculating compression scheme has been suggested for the beam bunching of heavy ion fusion. The recirculating beam buncher consists of induction linacs and bending sections. Induction modulators apply the velocity tilt for beam compression. The applied voltage is controlled so as to moderate the velocity tilt by the space charge force before the bending sections. As a result, the repulsion force of the beam is generally balanced with the bunching force during the compression process. Consequently, while the beam is gradually compressed under a quasi-equilibrium condition, the transverse mismatch from the velocity tilt of the bunching beam is suppressed to an allowable level.

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“…A compact Electron Ring is being developed at the University of Maryland to study space charge effects and collective behavior of beams in a circular lattice [2]. The UMER has been designed to transport an electron beam of 10 keV, 100 mA, and 50 ns in a circular lattice of 11.5 m in circumference.…”

Section: Introductionmentioning

confidence: 99%

Magnetic field measurements of printed-circuit quadrupoles and dipoles

Zhang

Bernal²,

Chin³

et al.

Proceedings of the 1999 Particle Accelerator Conference (Cat. No.99CH36366)

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Printed-Circuit (PC) quadrupoles and dipoles have been designed and developed for focusing and bending a spacecharge dominated electron beam in the University of Maryland Electron Ring (UMER) [1], currently under development. Due to the rather small aspect ratio (length/diameter < 1) of the magnets, the field quality, especially the nonlinear fringe field, has been a concern for the success of the UMER project. Extensive theoretical and experimental studies of the field structure of the magnets have been performed. Simple and precise methods for the magnetic field measurements of the PC magnets have been developed. In this paper, we present the various techniques and results of the measurements. The magnetic multipole components of quadrupoles and dipoles are determined from measurements with a long rotating coil. In addition, the integrated field of quadrupoles is obtained with the pulsed, taut-wire method. A comparison between the experimental results, theoretical analysis and calculation with a magnetics code, MAG-PC, is presented.

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Physics of intense charged-particle beams for heavy-ion inertial fusion

Cited by 8 publications

References 16 publications

Beam instability induced by space charge oscillation during final beam bunching for heavy ion inertial fusion

Beam instability induced by space charge oscillation during final beam bunching for heavy ion inertial fusion

A Concept of Quasi-Equilibrium, Recirculating Bunch Compressor for Heavy Ion Fusion.

Magnetic field measurements of printed-circuit quadrupoles and dipoles

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