Oxford Centre for High Energy Density Science (OxCHEDS)

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Efficient Raman amplification into the PetaWatt regime

(2008)

Authors:

RMGM Trines, F Fiúza, R Bingham, RA Fonseca, LO Silva, RA Cairns, PA Norreys
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Extreme ultraviolet emission from dense plasmas generated with sub-10-fs laser pulses

Physics of Plasmas AIP Publishing 15:10 (2008) 103301

Authors:

J Osterholz, F Brandl, M Cerchez, T Fischer, D Hemmers, B Hidding, A Pipahl, G Pretzler, SJ Rose, O Willi
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Image plate response for conditions relevant to laser-plasma interaction experiments

Measurement Science and Technology 19:9 (2008)

Authors:

IJ Paterson, RJ Clarke, NC Woolsey, G Gregori

Abstract:

We have measured the absolute response and detective quantum efficiency of image plates (IPs) for 5.9 keV x-rays using a calibrated iron-55 source. The types of IPs considered in this study are now commonly used as x-ray detectors in high-intensity laser-plasma interaction experiments, where conventional CCD fails because of the intense electromagnetic pulse that follows a high-intensity shot. Since the plates are not read out immediately after each laser shot, a detailed fading analysis of the plates is also presented. This work is important for future implementation of IPs as absolute x-ray photon detectors in large-scale laser facilities. © 2008 IOP Publishing Ltd.
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21aZB-2 EUV領域におけるX線自由電子レーザー集光実験(21aZB プラズマ基礎(高エネルギー密度プラズマ),領域2(プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理))

(2008) 160

Authors:

犬伏 雄一, AJ Nelson, J Dunn, R Nagler, JS Wark, C Caleman, M Berg, L Juha, B Rus, P Audebert, M Fajardo, RW Lee, T Tschentscher, S Toleikis, 兒玉 了祐
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Generation of stable, low-divergence electron beams by laser-wakefield acceleration in a steady-state-flow gas cell

Physical Review Letters 101:8 (2008)

Authors:

J Osterhoff, A Popp, Z Major, B Marx, TP Rowlands-Rees, M Fuchs, M Geissler, R Hörlein, B Hidding, S Becker, EA Peralta, U Schramm, F Grüner, D Habs, F Krausz, SM Hooker, S Karsch

Abstract:

Laser-driven, quasimonoenergetic electron beams of up to ∼200MeV in energy have been observed from steady-state-flow gas cells. These beams emitted within a low-divergence cone of 2.1±0.5mrad FWHM display unprecedented shot-to-shot stability in energy (2.5% rms), pointing (1.4 mrad rms), and charge (16% rms) owing to a highly reproducible gas-density profile within the interaction volume. Laser-wakefield acceleration in gas cells of this type provides a simple and reliable source of relativistic electrons suitable for applications such as the production of extreme-ultraviolet undulator radiation. © 2008 The American Physical Society.
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