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論文

Proton acceleration experiments and warm dense matter research using high power lasers

Roth, M.*; Alber, I.*; Bagnoud, V.*; Brown, C. R. D.*; Clarke, R.*; 大道 博行; Fernandez, J.*; Flippo, K.*; Gaillard, S.*; Gauthier, C.*; et al.

Plasma Physics and Controlled Fusion, 51(12), p.124039_1 - 124039_7, 2009/12

 被引用回数:27 パーセンタイル:72.19(Physics, Fluids & Plasmas)

The acceleration of intense proton and ion beams by ultra-intense lasers has matured to a point where applications in basic research and technology are being developed. Crucial for harvesting the unmatched beam parameters driven by the relativistic electron sheath is the precise control of the beam. In this paper we report on recent experiments using the PHELIX laser at GSI, the VULCAN laser at RAL and the TRIDENT laser at LANL to control and use laser accelerated proton beams for applications in high energy density research. We demonstrate efficient collimation of the proton beam using high field pulsed solenoid magnets, a prerequisite to capture and transport the beam for applications. Furthermore, we report on two campaigns to use intense, short proton bunches to isochorically heat solid targets up to the warm dense matter state. The temporal profile of the proton beam allows for rapid heating of the target, much faster than the hydrodynamic response time thereby creating a strongly coupled plasma at solid density. The target parameters are then probed by X-ray Thomson scattering to reveal the density and temperature of the heated volume. This combination of two powerful techniques developed during the past few years allows for the generation and investigation of macroscopic samples of matter in states present in giant planets or the interior of the earth.

論文

Laser-driven proton acceleration; Source optimization and radiographic applications

Borghesi, M.*; Bigongiari, A.*; Kar, S.*; Macchi, A.*; Romagnani, L.*; Audebert, P.*; Fuchs, A.*; Toncian, T.*; Willi, O.*; Bulanov, S. V.; et al.

Plasma Physics and Controlled Fusion, 50(12), p.124040_1 - 124040_10, 2008/12

 被引用回数:63 パーセンタイル:91.75(Physics, Fluids & Plasmas)

The paper corresponds to the plenary lecture presented at the EPS-2008 meeting. It contains a review of recent results obtained in the experiments and theory on the laser ion acceleration. The applications of the laser accelerated ions are also discussed.

論文

Observation of collisionless shocks in laser-plasma experiments

Romagnani, L.*; Bulanov, S. V.; Borghesi, M.*; Audebert, P.*; Gauthier, J. C.*; L$"o$wenbr$"u$ck, K.*; Mackinnon, A. J.*; Patel, P.*; Pretzler, G.*; Toncian, T.*; et al.

Physical Review Letters, 101(2), p.025004_1 - 025004_4, 2008/07

 被引用回数:137 パーセンタイル:95.71(Physics, Multidisciplinary)

The propagation in a rarefied plasma of collisionless shock-waves and ion-acoustic solitons, excited following the interaction of a long and intense laser pulse with solid targets, has been investigated via proton probing techniques. The shocks structures and related electric field distributions were reconstructed with high spatial and temporal resolution. The experimental results were interpreted within the framework of the nonlinear wave description based on the Korteweg-de Vries-Burgers (KdV-B) equation.

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