Supersonic heat wave propagation in laser-produced underdense plasma for efficient x-ray generation

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-dim...

Full description

Saved in:
Bibliographic Details
Published in:Journal of physics. Conference series 2008-05, Vol.112 (2), p.022076
Main Authors: Tanabe, M, Nishimura, H, Fujioka, S, Nagai, K, Iwamae, A, Ohnishi, N, Fournier, K B, Girard, F, Primout, M, Villette, B, Tobin, M, Mima, K
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION
ABSORPTION
Aerogels
ENGINEERING
HYDRODYNAMICS
IONIZATION
LASERS
Physics
PLASMA
Propagation
Propagation velocity
REFLECTION
SIMULATION
TARGETS
VELOCITY
WAVE PROPAGATION
X ray imagery
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/112/2/022076