Oxford Centre for High Energy Density Science (OxCHEDS)

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Bright quasi-phasematched soft x-ray harmonic radiation from Argon ions

(2007)

Authors:

M Zepf, B Dromey, M Landreman, P Foster, SM Hooker
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Quasi-phasematching of harmonic generation via multimode beating in waveguides

(2007)

Authors:

B Dromey, M Zepf, M Landreman, SM Hooker
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Observations of Plasmons in Warm Dense Matter

Physical Review Letters 98 (2007) 065002 (4 pages)

Authors:

G Gregori, S. H. Glenzer, O.L. Landen, R. Redmer
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The Effect of Laser Focusing Conditions on Propagation and Monoenergetic Electron Production in Laser Wakefield Accelerators

(2007)

Authors:

AGR Thomas, Z Najmudin, SPD Mangles, CD Murphy, AE Dangor, C Kamperidis, KL Lancaster, WB Mori, PA Norreys, W Rozmus, K Krushelnick
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Transverse interferometry of a hydrogen-filled capillary discharge waveguide.

Phys Rev Lett 98:2 (2007) 025002

Authors:

AJ Gonsalves, TP Rowlands-Rees, BHP Broks, JJAM van der Mullen, SM Hooker

Abstract:

Transverse interferometric measurements are presented of the plasma channel formed in a hydrogen-filled capillary discharge waveguide recently used to generate 1 GeV electrons in a laser-driven plasma accelerator for the first time. The measurements were found to be in good agreement with nonlocal thermal equilibrium simulations, but showed significant differences with the results of a quasistatic model developed by Bobrova et al. [Phys. Rev. E. 65, 016407 (2001)]. The measurements are used to determine scaling laws for the axial electron density and matched spot size of the plasma channel, enabling optimization of the channel to specific applications.
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