Abstract
We have measured the production of hv ≥ 10 keV x rays from low-density, Ge-doped aerogel targets at the OMEGA laser (Laboratory for Laser Energetics, University of Rochester). The targets were 1.2mm long by 1.5mm diameter beryllium cylinders filled with Ge-doped (20 atomic percent) SiO 2 aerogel. The doped-aerogel density was 4.8 or 6.5 mg/cm 3 . Forty beams of the OMEGA laser (λ = 351 nm) illuminated the two cylindrical faces of the target with a total power of ≥ 18 TW. Ge K-shell x-ray emission was spectrally resolved with a two-channel crystal spectrometer and recorded with temporal resolution with a set of calibrated photoconductive devices (PCDs).
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