Coulomb scattering within a spherical beam bunch in a high current linear accelerator

Gluckstern, R.L.; Fedotov, A. V.

doi:10.1103/physrevstab.2.054201

Cited by 13 publications

(7 citation statements)

References 11 publications

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“…While analytical theory [3,4] indicated that space-charge-dominated beams were unstable to collective modes, particle-in-cell computer simulations showed all but one of these modes stabilizing nonlinearly and quickly, with negligible heating of the beam. The Single Beam Transport experiment [5] showed that the simulations were correct, and delineated the stable regime for propagation.…”

Section: Status Of Heavy-ion Fusion Physicsmentioning

confidence: 99%

Heavy Ion Fusion — Using Heavy Ions to Make Electricity

Celata

2005

Acta Physica Hungarica A) Heavy Ion Physics

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Abstract. The idea of using nuclear fusion as a source of commercial electrical power has been pursued worldwide since the 1950s. Two approaches, using magnetic and inertial confinement of the reactants, are under study. This paper describes the difference between the two approaches, and discusses in more detail the heavy-ion-driven inertial fusion concept. A multibeam induction linear accelerator would be used to bring ∼100 heavy ion beams to a few GeV. The beams would then heat and compress a target of solid D-T. This approach is unique among fusion concepts in its ability to protect the reaction chamber wall from neutrons and debris.

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Section: Status Of Heavy-ion Fusion Physicsmentioning

confidence: 99%

Heavy Ion Fusion — Using Heavy Ions to Make Electricity

Celata

2005

Acta Physica Hungarica A) Heavy Ion Physics

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“…E-mail: fjq96@iris.ciae.ac.cn beam spill below parts in 10-5-10-8/m, have to be satisfied in the applications. Therefore, the study of halochaos has become one of the key issues which a focusing research subject has been formulated on developing new high-power accelerators (Gluckstern, 1994;Chen and Davidson, 1994;Lagniel, 1994;Fink and Chen, 1997;Gluckstern et al, 1998;Gluckstern and Fedotov, 1999;Fedotov and Gluckstern, 1999; Wang, 1999;Fang, 2000). In this area, what needs to be resolved includes not only a better understanding mechanisms of beam halo-chaos formation but also its suppression and control.…”

Section: Introductionmentioning

confidence: 99%

Controlling halo‐chaos via wavelet‐based feedback

Jin-Qing

Chen

Zhao

2002

Discrete Dynamics in Nature and Society

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Halo-chaos in high-current accelerator has become one of the key issues because it can cause excessive radioactivity from the accelerators and significantly limits the applications of the new accelerators in industrial and other fields. Some general engineering methods for chaos control have been developed, but they generally are unsuccessful for halo-chaos suppression due to many technical constraints. In this article, controllability condition for beam halo-chaos is analyzed qualitatively. Then Particles-in-Cell (PIC) simulations explore the nature of beam halo-chaos formation. A nonlinear control method and wavelet function feedback controller are proposed for controlling beam halo-chaos. After control of beam halo-chaos for initial proton beam with water bag distributions, the beam halo strength factor H is reduced to zero, and other statistical physical quantities of beam halo-chaos are doubly reduced. The results show that the developed methods in this paper are very effective for proton beam halo-chaos suppression. Potential application of the halo-chaos control method is finally pointed out

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“…We then related our analysis to diffusion caused by many small angle Coulomb collisions, with the conclusion that the effect of multiple Coulomb collisions in halo development in high current ion accelerators is also expected not to be important [28].…”

Section: Coulomb Scatteringmentioning

confidence: 99%

“…Despite the general belief that collisions are not important it is clear that a rigorous treatment of this question is needed. In an effort to explore this issue in detail we have undertaken an analysis of the effects of Coulomb scattering between ions in a self-consistent spherical bunch [28]. We have calculated the effect of single Coulomb scattering of a self-consistent 6-D distribution for a spherical beam bunch.…”

Section: Coulomb Scatteringmentioning

confidence: 99%

Halo formation in intense bunched beams

Fedotov

Gluckstern²

1999

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

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The latest designs for high current ion linacs (Accelerator for the Transmutation of Waste, Accelerator for the Production of Tritium, Heavy Ion Drivers, Spallation Neutron Source Injector) require minimal radioactivation by the beam striking the beam pipe. As a result, efforts are being made to understand and control the growth of beam halo. There is general agreement that halos develop as a result of the parametric resonance between the ion oscillations in the beam bunch and collective oscillations of the bunch itself induced by mismatch in the linac. Analytic studies for a 2-D KV beam were found to give excellent agreement with corresponding computer simulations, which were then extended to other 2-D beams. Recently, analytic and numerical studies were performed for 3-D beam bunches (6-D phase space distributions), focusing attention on the formation of longitudinal halos and the possibility of bunch growth or loss of longitudinal bunch stability, as well as coupling between the longitudinal and transverse halos.

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Coulomb scattering within a spherical beam bunch in a high current linear accelerator

Cited by 13 publications

References 11 publications

Heavy Ion Fusion — Using Heavy Ions to Make Electricity

Heavy Ion Fusion — Using Heavy Ions to Make Electricity

Controlling halo‐chaos via wavelet‐based feedback

Halo formation in intense bunched beams

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