skip to main content

Title: The effects of pulse duration on ablation pressure driven by laser radiation

The effects of laser pulse duration on the ablation pressure induced by laser radiation are investigated using Al target. Numerical simulation results using one dimensional radiation hydro code for laser intensities from 5×10{sup 12}W/cm{sup 2} to 5×10{sup 13}W/cm{sup 2} and pulse durations from 0.5 ns to 20 ns are presented. These results suggest that the laser intensity scaling law of ablation pressure differs for different pulse durations. And the theoretical analysis shows that the effects of laser pulse duration on ablation pressure are mainly caused by two regimes: the unsteady-state flow and the radiative energy loss to vacuum.
Authors:
 [1] ;  [2] ; ;  [3] ;  [4] ;  [1]
  1. College of Physical Science and Technology, Sichuan University, Chengdu 610065 (China)
  2. (China)
  3. National Key Laboratory of Shock Wave and Denotation Physics, Institute of Fluid Physics, CAEP, Mianyang 621900 (China)
  4. State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062 (China)
Publication Date:
OSTI Identifier:
22399369
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 12; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ABLATION; ALUMINIUM; COMPUTERIZED SIMULATION; ELECTROMAGNETIC PULSES; ENERGY LOSSES; LASER RADIATION; ONE-DIMENSIONAL CALCULATIONS; PHYSICAL RADIATION EFFECTS; SCALING LAWS