Utilization of high energy, small emittance accelerators for ICF target experiments

Arnold, R.C.; Colton, E.; Fenster, S.; Foss, M.; Magelssen, G. R.; Moretti, A.

doi:10.1016/0167-5087(82)90157-0

Cited by 37 publications

(24 citation statements)

References 6 publications

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“…LAPLAS target requires an annular focal spot that must be generated in some way. Early in 1982 Arnold et al [12] proposed to use a rotating beam to generate a ring shaped heated region in a cylindrical target. This is the approach currently adopted at GSI and the design and construction of a rf-wobbler system is now under the responsibility of the researchers at ITEP (Institute for Theoretical and Experimental Physics) in Moscow, Russia.…”

Section: Generation Of a Hollow Ion Beam: Symmetry Analysismentioning

confidence: 99%

Analytical Models for the Design of the LAPLAS Experiment

Piriz

Tahir

López

et al. 2007

Contrib. Plasma Phys.

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We review the theoretical activity at the University of Castilla-La Mancha directed to the design of the LAPLAS (Laboratory of Planetary Sciences) experiment in the framework of the HEDgeHOB international collaboration. We have developed analytical models for the different phases of LAPLAS, including models for the implosion of the cylindrical shell target, for the generation of an annular focal spot by means of a high-frequency wobbler system and for the hydrodynamic instabilities that could affect the performance of the target implosion. These models have been complemented with one and two-dimensional numerical simulations and such a combination have allowed us to have a powerful tool available for the design of the experiments as well as for the interpretation of their results.

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Section: Generation Of a Hollow Ion Beam: Symmetry Analysismentioning

confidence: 99%

Analytical Models for the Design of the LAPLAS Experiment

Piriz

Tahir

López

et al. 2007

Contrib. Plasma Phys.

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“…The major benefit of the presented experimental design as compared to other approaches for EOS measurement with heavy ion beams (Arnold et al, 1982;Hoffmann et al, 2002) is two-fold. First, the EOS along a compression adiabat can be determined by measuring of only one parameter-the rear surface velocity employing a line-imaging VISAR as the principal diagnostics.…”

mentioning

confidence: 94%

Ramp wave loading experiments driven by heavy ion beams: A feasibility study

2009

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A new design for heavy-ion beam driven ramp wave loading experiments is suggested and analyzed. The proposed setup utilizes the long stopping ranges and the variable focal spot geometry of the high-energy uranium beams available at the GSI Helmholtzzentrum für Schwerionenforschung and Facility for Antiproton and Ion Research accelerator centers in Darmstadt, Germany. The release wave created by ion beams can be utilized to create a planar ramp loading of various samples. In such experiments, the predicted high pressure amplitudes (up to 10 Mbar) and short timescales of compression (,10 ns) will allow to test the time-dependent material deformation at unprecedented extreme conditions.

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“…This work builds on two earlier concepts: elliptical beams applied to a distributed-radiator target 5 and beams that are wobbled so as to trace a number of full rotations around a circular or elliptical path. [6][7][8][9][10][11][12][13][14][15] In the aforementioned applications, the ion beam pulse is temporally compressed after exiting the accelerator via a process called drift compression, analogous to chirped-pulse compression of laser pulses. A head-to-tail velocity gradient, or "tilt," is imparted to the beam, which then drifts for some distance, while the beam's tail (nearly) "catches up" with its head.…”

Section: Introductionmentioning

confidence: 99%

Arc-based smoothing of ion beam intensity on targets

Friedman

2012

Physics of Plasmas

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By manipulating a set of ion beams upstream of a target, it is possible to arrange for a smoother deposition pattern, so as to achieve more uniform illumination of the target. A uniform energy deposition pattern is important for applications including ion-beam-driven high energy density physics and heavy-ion beam-driven inertial fusion energy ("heavy-ion fusion"). Here, we consider an approach to such smoothing that is based on rapidly "wobbling" each of the beams back and forth along a short arc-shaped path, via oscillating fields applied upstream of the final pulse compression. In this technique, uniformity is achieved in the time-averaged sense; this is sufficient provided the beam oscillation timescale is short relative to the hydrodynamic timescale of the target implosion. This work builds on two earlier concepts: elliptical beams applied to a distributed-radiator target [D. A. Callahan and M. Tabak, Phys. Plasmas 7, 2083 (2000)] and beams that are wobbled so as to trace a number of full rotations around a circular or elliptical path [R. C. Arnold et al., Nucl. Instrum. Methods 199, 557 (1982)]. Here, we describe the arc-based smoothing approach and compare it to results obtainable using an elliptical-beam prescription. In particular, we assess the potential of these approaches for minimization of azimuthal asymmetry, for the case of a ring of beams arranged on a cone. It is found that, for small numbers of beams on the ring, the arc-based smoothing approach offers superior uniformity. In contrast with the full-rotation approach, arc-based smoothing remains usable when the geometry precludes wobbling the beams around a full circle, e.g., for the X-target [E. Henestroza, B. G. Logan, and L. J. Perkins, Phys. Plasmas 18, 032702 (2011)] and some classes of distributed-radiator targets. V C 2012 American Institute of Physics. [http://dx.

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Utilization of high energy, small emittance accelerators for ICF target experiments

Cited by 37 publications

References 6 publications

Analytical Models for the Design of the LAPLAS Experiment

Analytical Models for the Design of the LAPLAS Experiment

Ramp wave loading experiments driven by heavy ion beams: A feasibility study

Arc-based smoothing of ion beam intensity on targets

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