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Published on: April 25, 2019
Line focusing for soft x-ray laser-plasma lasing.
Davide Bleiner1, Jürg E Balmer, Felix Staub
1Institute for Applied Physics, University of Bern, Berne, Switzerland. bleiner@iap.unibe.ch
Applied Optics
|December 24, 2011
Summary
This study compares two computational methods for line-focus generation, finding they yield identical results. Longer line foci are advantageous for amplification as long as the irradiance remains above the amplification threshold.
Area of Science:
- Computational physics
- Optics
- Plasma physics
Background:
- Line-focus generation is crucial for applications requiring high irradiance.
- Two distinct optical geometries can achieve line focusing using spherical mirrors.
- Understanding the relationship between focus geometry and amplification is essential.
Purpose of the Study:
- To computationally investigate and compare two methods of line-focus generation.
- To analyze the impact of incidence angle on line-focus length and amplification.
- To explore the conditions influencing the amplification threshold.
Main Methods:
- Development and utilization of a self-written ray-tracing code.
- Comparison of computational results with experimental data.
- Analysis of two line-focusing geometries: sagittal astigmatism and spherical aberration.
Main Results:
- Both astigmatism-based and spherical aberration-based line focusing produced identical computational results.
- Line-focus length is directly influenced by the incidence angle on the target.
- A longer line focus is beneficial for amplification above the determined threshold.
Conclusions:
- The equivalence of sagittal astigmatism and spherical aberration for line focusing is computationally validated.
- Optimizing line-focus length by adjusting incidence angle can enhance amplification efficiency.
- The study provides insights into managing amplification thresholds based on operating parameters and plasma conditions.
