Oxford Centre for High Energy Density Science (OxCHEDS)

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Electronic conduction in shock-compressed water

Physics of Plasmas AIP Publishing 11:8 (2004) l41-l44

Authors:

PM Celliers, GW Collins, DG Hicks, M Koenig, E Henry, A Benuzzi-Mounaix, D Batani, DK Bradley, LB Da Silva, RJ Wallace, SJ Moon, JH Eggert, KKM Lee, LR Benedetti, R Jeanloz, I Masclet, N Dague, B Marchet, M Rabec Le Gloahec, Ch Reverdin, J Pasley, O Willi, D Neely, C Danson
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Laboratory measurements of 0.7 GG magnetic fields generated during high-intensity laser interactions with dense plasmas

Physical Review E - Statistical, Nonlinear, and Soft Matter Physics 70:2 2 (2004)

Authors:

U Wagner, M Tatarakis, A Gopal, FN Bee, EL Clark, AE Dangor, RG Evans, MG Haines, SPD Mangles, PA Norreys, MS Wei, M Zepf, K Krushelnick

Abstract:

Measurements of ultrahigh magnetic fields produced during intense laser interaction with solids were presented. Polarization measurements of high-order laser harmonics suggest the existence of magnetic field strengths of 0.7±0.1 GG. It was found that denser regions of the plasma can be probed using higher order harmonics. The technique was found to be useful for the measurements of multi-GG level magnetic fields.
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Charge-State Distribution and Doppler Effect in an Expanding Photoionized Plasma

Physical Review Letters American Physical Society (APS) 93:5 (2004) 055002

Authors:

ME Foord, RF Heeter, PAM van Hoof, RS Thoe, JE Bailey, ME Cuneo, H-K Chung, DA Liedahl, KB Fournier, GA Chandler, V Jonauskas, R Kisielius, LP Mix, C Ramsbottom, PT Springer, FP Keenan, SJ Rose, WH Goldstein
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Observation of the parametric two-ion decay instability with thomson scattering.

Phys Rev Lett 93:4 (2004) 045004

Authors:

C Niemann, SH Glenzer, J Knight, L Divol, EA Williams, G Gregori, BI Cohen, C Constantin, DH Froula, DS Montgomery, RP Johnson

Abstract:

We present the first direct experimental observation of the parametric two-ion decay instability of ion-acoustic waves driven by a high intensity (5 x 10(15) W cm(-2)) laser beam in a laser produced high-Z plasma. Using two separate Thomson scattering diagnostics simultaneously, we directly measure the scattering from thermal ion-acoustic fluctuations, the primary ion waves that are driven to large amplitudes by the high intensity beam, and the two-ion decay products. The decay products are shown to be present only where the interaction takes place and their k spectrum is broad.
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Direct observation of the saturation of stimulated Brillouin scattering by ion-trapping-induced frequency shifts

Physical Review Letters 93:3 (2004)

Authors:

DH Froula, L Divol, AA Offenberger, N Meezan, T Ao, G Gregori, C Niemann, D Price, CA Smith, SH Glenzer

Abstract:

The measurement of the saturation of stimulated Brillouin scattering (SBS) by an ion-trapping-induced frequency shift was investigated. It was achieved by directly measuring the amplitude and absolute frequency of SBS-driven ion-acoustic waves (IAW). A frequency of up to 30% was observed along with a saturation of driven SBS and IAW reflectivity. The fast 30 ps oscillations of the SBS-driven IAW amplitude induced by the frequency shift were also measured.
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