242 research outputs found

    Multi-Messenger Measurements of the Static Structure of Shock-Compressed Liquid Silicon at 100 GPa

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    Ionic structure of high pressure, high temperature fluids is a challenging theoretical problem with applications to planetary interiors and fusion capsules. Here we report a multi-messenger platform using velocimetry and \textit{in situ} angularly and spectrally resolved X-ray scattering to measure the thermodynamic conditions and ion structure factor of materials at extreme pressures. We document the pressure, density, and temperature of shocked silicon near 100 GPa with uncertainties of 6%, 2%, and 20%, respectively. The measurements are sufficient to distinguish between and rule out some ion screening models.Comment: Main Paper: 5 pages, 4 figures. Supplementary Material: 9 pages, 8 figure

    Terawatt, Joule-Class Pulsed THz Sources from Microchannel Targets

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    Production of terawatt, joule class THz radiation sources from microchannel targets driven with 100s of joule, picosecond lasers is reported. THz sources of this magnitude are useful for non-linear pumping of matter and for charged particle acceleration and manipulation. Microchannel targets demonstrate increased conversion efficiency compared to planar foil targets, with laser energy to THz energy conversion up to 0.9 percent.Comment: 9 pages, 2 figure

    Samlet plan for utslipp til vann fra steinindustrien (larvikittprodusentene) i Larvik Del 1 Resipientundersøkelser 2006-2008 (Datarapport)

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    Rapporten inneholder: Stasjonsregister med koordinater Alle stasjonene vist på karter Alle fysiske, kjemiske, og biologiske primærdata i tabellerLarvikittprodusentenes Forening (LPF
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