Laser-ablation rates measured using x-ray laser transmission
M H Edwards1, D S Whittaker, G J Tallents
1Department of Physics, University of York, York, UK.
Physical Review Letters
|February 1, 2008
Summary
Researchers measured the laser ablation rate of iron using an X-ray laser. This technique allows precise measurement of material removal by observing X-ray transmission through ablated iron targets.
Area of Science:
- Plasma physics
- Materials science
- Laser-matter interaction
Background:
- Laser ablation is crucial for material processing and understanding laser-plasma interactions.
- Accurate measurement of ablation rates is essential for predictive modeling.
- Previous methods for measuring ablation rates have limitations in precision and temporal resolution.
Purpose of the Study:
- To develop and validate a novel method for measuring the laser ablation rate of solid iron.
- To quantify the ablation rate of iron at specific high irradiance conditions (approx. 2 x 10^14 W cm^-2).
- To investigate the transparency of ablated material to X-ray lasers.
Main Methods:
- Utilized a neonlike zinc X-ray laser (21.2 nm) as a diagnostic probe.
- Irradiated thin solid iron targets with a high-intensity laser at approximately 2 x 10^14 W cm^-2.
- Measured the time-resolved transmission of the X-ray laser through the iron targets.
Main Results:
- Demonstrated that ablated iron becomes transparent to the 21.2 nm X-ray laser.
- Successfully measured the thickness of unablated material.
- Quantified the laser ablation rate of iron under the experimental conditions.
Conclusions:
- Time-resolved X-ray laser transmission is an effective method for measuring laser ablation rates.
- The developed technique provides high precision and temporal resolution for studying laser-matter interactions.
- This method can be applied to various materials and laser parameters for ablation studies.
