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Harmonic Generation from Relativistic Plasma Surfaces in Ultra-Steep Plasma Density Gradients
- Publication Year :
- 2012
- Publisher :
- arXiv, 2012.
-
Abstract
- Harmonic generation in the limit of ultrasteep density gradients is studied experimentally. Observations reveal that, while the efficient generation of high order harmonics from relativistic surfaces requires steep plasma density scale lengths (${L}_{p}/\ensuremath{\lambda}l1$), the absolute efficiency of the harmonics declines for the steepest plasma density scale length ${L}_{p}\ensuremath{\rightarrow}0$, thus demonstrating that near-steplike density gradients can be achieved for interactions using high-contrast high-intensity laser pulses. Absolute photon yields are obtained using a calibrated detection system. The efficiency of harmonics reflected from the laser driven plasma surface via the relativistic oscillating mirror was estimated to be in the range of ${10}^{\ensuremath{-}4}--{10}^{\ensuremath{-}6}$ of the laser pulse energy for photon energies ranging from 20--40 eV, with the best results being obtained for an intermediate density scale length.
- Subjects :
- Physics
Range (particle radiation)
Photon
General Physics and Astronomy
FOS: Physical sciences
Lambda
Laser
Physics - Plasma Physics
law.invention
Plasma Physics (physics.plasm-ph)
Relativistic plasma
law
Harmonics
High harmonic generation
Atomic physics
Plasma density
Physics - Optics
Optics (physics.optics)
Subjects
Details
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....fb272050aea1e13b04415925d52ef201
- Full Text :
- https://doi.org/10.48550/arxiv.1205.6821