Self-aligning concave relativistic plasma mirror with adjustable focus
| Autor: | Alexey Arefiev, David Stark, Rafal Zgadzaj, Michael C. Downer, Xiaoming Wang, Joseph M. Shaw, Hai-En Tsai |
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| Rok vydání: | 2016 |
| Předmět: |
Physics::Instrumentation and Detectors
Fluids & Plasmas Classical Physics Physics::Optics FOS: Physical sciences 01 natural sciences Atomic 010305 fluids & plasmas law.invention Optics Particle and Plasma Physics Relativistic plasma law physics.plasm-ph 0103 physical sciences Nuclear Irradiation 010306 general physics Physics Range (particle radiation) business.industry Molecular Plasma Computational Physics (physics.comp-ph) Condensed Matter Physics Laser Physics - Plasma Physics Pulse (physics) Intensity (physics) Plasma Physics (physics.plasm-ph) Radiation pressure physics.comp-ph physics.optics business Physics - Computational Physics Astronomical and Space Sciences Physics - Optics Optics (physics.optics) |
| Zdroj: | Physics of Plasmas, vol 24, iss 1 Tsai, HE; Arefiev, AV; Shaw, JM; Stark, DJ; Wang, X; Zgadzaj, R; et al.(2017). Self-aligning concave relativistic plasma mirror with adjustable focus. Physics of Plasmas, 24(1). doi: 10.1063/1.4973432. UC San Diego: Retrieved from: http://www.escholarship.org/uc/item/9t03t8p6 |
| DOI: | 10.48550/arxiv.1610.02007 |
| Popis: | We report an experimental-computational study of the optical properties of plasma mirrors (PMs) at the incident laser frequency when irradiated directly at relativistic intensity (1e18 < I_0 < 1e19 W/cm^2) by near-normally incident (4 degree), high-contrast, 30 fs, 800 nm laser pulses. We find that such relativistic PMs are highly reflective (0.6 to 0.8), and focus a significant fraction of reflected light to intensity as large as 10I_0 at distance f as small 25 microns from the PM, provided that pre-pulses do not exceed 1e14 W/cm^2 prior to 20 ps before arrival of the main pulse peak. Particle-in-cell simulations show that focusing results from denting of the reflecting surface by light pressure combined with relativistic transparency, and that reflectivity and f can be adjusted by controlling pre-plasma length L over the range 0.5 < L < 3 microns. Pump-probe reflectivity measurements show the PM's focusing properties evolve on a ps time scale. 11 pages, 10 figures |
| Databáze: | OpenAIRE |
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