Extensive characterization of Marshak waves observed at the LIL laser facility
نویسندگان
چکیده
We detail results of an experiment performed at the Ligne d'Intégration Laser facility aimed studying supersonic and diffusive radiation front propagation in low-density SiO2 aerogel (20 40 mg/cm3) enclosed a gold tube, driven by thermal emission from laser-heated spherical cavity. The evolution is studied continuously measuring its self-emission with 1D (one-dimensional) time-resolved soft x-ray imager. Measurement along (through 200-μm-wide observation slit) exit tube giving access to dynamics curvature front. Experimental are then compared successfully 3D (three-dimensional) hydrodynamics code TROLL, which shows that if continuous tracking position accessible this experimental scheme, measurement maximum temperature on contrary affected closure slit. simulations also indicate effect can even be worsened one includes pointing errors Radiation was inferred combining imager wall shock breakout time using velocity interferometer system for any reflector broadband spectrometer used determine tube. A decrease observed, being more important higher density.
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ژورنال
عنوان ژورنال: Physics of Plasmas
سال: 2022
ISSN: ['1070-664X', '1527-2419', '1089-7674']
DOI: https://doi.org/10.1063/5.0124994