Burn-through of thin aluminum foils by laser-driven ablation
Aluminum foils 1--75 ..mu..m thick were irradiated by 500-psec Nd-glass laser pulses with intensities 6 x 10/sup 12/ to 10/sup 14/ W/cm/sup 2/. The reflected and transmitted light and the produced x rays were measured using PIN photodiodes and crystal spectrometers. Two torsion pendula were used to measure the target and the plasma momenta. Both measurements are consistent with a simple hydrodynamic model. We obtain plasma pressures in the range 1.5--13 Mbars, shock-wave velocities between 0.9 x 10/sup 6/ and 2.6 x 10/sup 6/ cm/sec, penetration depths of the ablation surface in the domain of 3--10 ..mu..m for laser intensities in the range 6 x 10/sup 12/ to 10/sup 14/ W/cm/sup 2/. The burn-through times (i.e., the times that a hole is opened in the foil) for foils 25, 50, and 75 ..mu..m thick are measured to be 8 +- 5, 18 +- 5, and 25 +- 5 nsec, respectively.
- Research Organization:
- Plasma Physics Department, Soreq Nuclear Research Centre, Yavne 70600, Israel
- OSTI ID:
- 5763642
- Journal Information:
- J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 50:11; ISSN JAPIA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360106* -- Metals & Alloys-- Radiation Effects
ABLATION
ALUMINIUM
DATA
DIMENSIONS
ELECTROMAGNETIC RADIATION
ELEMENTS
FOILS
INFORMATION
IONIZING RADIATIONS
LASER RADIATION
LASERS
LINEAR MOMENTUM
LONGITUDINAL MOMENTUM
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
METALS
NEODYMIUM LASERS
PENETRATION DEPTH
PHOTODIODES
PHYSICAL RADIATION EFFECTS
PULSES
RADIATION EFFECTS
RADIATIONS
REFLECTION
SEMICONDUCTOR DEVICES
SEMICONDUCTOR DIODES
SHOCK WAVES
SOLID STATE LASERS
SPECTROMETERS
TARGETS
THICKNESS
VELOCITY
X RADIATION