Harmonic Generation from Relativistic Plasma Surfaces in Ultra-Steep Plasma Density Gradients
| Autor: | Alexey Belyanin, Brendan Dromey, Malte C. Kaluza, E. Eckner, Mirela Cerchez, O. Jäckel, Gerhard G. Paulus, Silvio Fuchs, J. Bierbach, Christian Rödel, S. Herzer, M. Behmke, G. Pretzler, Oswald Willi, Matthew Zepf, Toma Toncian, D. Hemmers, T. Hahn, Alexander Pukhov, Mark Yeung, A. Galestian Pour, D. an der Brügge |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
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) |
| DOI: | 10.48550/arxiv.1205.6821 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|