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A laser-accelerated beam of protons is used to isochorically heat a silicon foil to multi-eV temperatures. Proton dosimetry, self-emission, and synchronized reflective interferometry are used simultaneously to infer internal energy, temperature, and pressure.
Summary form only given. Experimental data of electron energy distributions from ultra-intense (>1019 W/cm2) laser-solid interactions using a petawatt laser containing >300 Joules are presented. Clear signatures for the existence of three populations of energetic electrons, all with distinct effective temperatures, are seen in the spectra. We present simulations and theoretical calculations...
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