We have observed supersonic heat wave propagation in a low-density aerogel target (ρ ∼ 3.2 mg/cc) irradiated at the intensity of 4 × 1014 W/cm2. The heat wave propagation was measured with a time-resolved x-ray imaging diagnostics, and the results were compared with simulations made with the two-dimensional radiation-hydrodynamic code, RAICHO. Propagation velocity of the ionization front very slightly decreased as the wave propagates into the target. The reason of decrease is due to increase of laser absorption region as the front propagates and interplay of hydrodynamic motion and reflection of laser propagation in the target. These features are well reproduced with the simulation.
|Journal||Journal of Physics: Conference Series|
|Issue number||Part 2|
|Publication status||Published - 2008 Jun 12|
|Event||5th International Conference on Inertial Fusion Sciences and Applications, IFSA 2007 - Kobe, Japan|
Duration: 2007 Sep 9 → 2007 Sep 14
ASJC Scopus subject areas
- Physics and Astronomy(all)