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X-ray amplification by laser controlled coherent bremsstrahlung.
K Z Hatsagortsyan1, C H Keitel
1Theoretische Quantendynamik, Fakultät für Physik, Universität Freiburg, Hermann-Herder-Strasse 3, D-79104 Freiburg, Germany.
Physical Review Letters
|April 6, 2001
Summary
This study proposes a novel coherent X-ray generation method combining free electron laser and atomic high harmonic generation principles. The technique achieves significant X-ray amplification, rivaling current leading X-ray free electron lasers.
Area of Science:
- Physics
- Quantum Optics
- Materials Science
Background:
- Current X-ray generation methods like free electron lasers (FELs) and high harmonic generation (HHG) have limitations.
- There is a need for compact, efficient, and tunable coherent X-ray sources.
Purpose of the Study:
- To propose a novel coherent X-ray generation scheme.
- To investigate the amplification characteristics of generated X-rays.
- To compare the proposed scheme with existing X-ray sources.
Main Methods:
- Exposing a thin solid layer or periodic atomic structure to a superintense laser pulse.
- Analyzing electron extraction and periodic penetration through the ionic structure.
- Calculating the small signal gain of the generated X-ray radiation.
Main Results:
- Coherent amplification of thousands of laser radiation harmonics.
- Demonstration of significant small signal gain for generated X-ray radiation.
- The proposed scheme shows competitive gain compared to leading X-ray FELs.
Conclusions:
- The proposed scheme offers a promising new avenue for coherent X-ray generation.
- This method integrates features of FELs and HHG for enhanced performance.
- The results suggest potential for compact and powerful X-ray sources.