Measuring preheat in laser-drive aluminum using velocity interferometer system for any reflector: Experiment

Journal Article · Fri Aug 15 00:00:00 EDT 2014 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4891429· OSTI ID:22303783

Shu, Hua; Fu, Sizu; Huang, Xiuguang; Wu, Jiang; Xie, Zhiyong; Zhang, Fan; Ye, Junjian; Jia, Guo; Zhou, Huazhen ^[1]

---

1. Shanghai Institute of Laser Plasma, P.O. BOX 800-229, Shanghai 201800 (China)

In this paper, we systematically study preheating in laser-direct-drive shocks by using a velocity interferometer system for any reflector (VISAR). Using the VISAR, we measured free surface velocity histories of Al samples over time, 10–70 μm thick, driven directly by a laser at different frequencies (2ω, 3ω). Analyzing our experimental results, we concluded that the dominant preheating source was X-ray radiation. We also discussed how preheating affected the material initial density and the measurement of Hugoniot data for high-Z materials (such as Au) using impedance matching. To reduce preheating, we proposed and tested three kinds of targets.

• OSTI ID: 22303783
• Journal Information: Physics of Plasmas, Vol. 21, Issue 8; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALUMINIUM
HEAT TREATMENTS
IMPEDANCE
INTERFEROMETERS
LASERS
MATERIALS
SURFACES
VELOCITY
X RADIATION