Specular reflectivity of plasma mirrors as a function of intensity, pulse duration, and angle of incidence

Ziener, C.; Foster, P.; Divall, E. J.; Hooker, C. J.; Hutchinson, M. H. R.; Langley, A. J.; Neely, D.

doi:10.1063/1.1525062

Cited by 89 publications

(68 citation statements)

References 13 publications

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“…At low power, the observed reflectivity was 5% in good agreement with the calculated Fresnel reflection value of 6% using the refractive index of water, n=1.33. The plasma mirror 'triggers' around 3-4 x 10 13 W/cm 2 , consistent with the results obtained by other groups using solid targets [13]. The reflectivity curve starts to saturate at 1x10 15 W/cm 2 reaching maximum reflectivity of 68% at the input intensity of 5 x 10 15 W/cm 2 .…”

Section: Performance Of the Plasma Mirrorsupporting

confidence: 80%

Demonstration of a plasma mirror based on a laminar flow water film

Panasenko

Shu

Gonsalves

et al. 2010

Journal of Applied Physics

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Abstract.A plasma mirror based on a laminar water film with low flow speed (0.5 -2 cm/s) has been developed and characterized, for use as an ultra-high intensity optical reflector. The use of flowing water as a target surface automatically results in each laser pulse seeing a new interaction surface and avoids the need for mechanical scanning of the target surface. In addition, the breakdown of water does not produce contaminating debris that can be deleterious to vacuum chamber conditions and optics such as is the case when using conventional solid targets. The mirror exhibits 70% reflectivity, while maintaining high-quality of the reflected spot.

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Section: Performance Of the Plasma Mirrorsupporting

confidence: 80%

Demonstration of a plasma mirror based on a laminar flow water film

Panasenko

Shu

Gonsalves

et al. 2010

Journal of Applied Physics

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“…Target foils are mounted in a multi-target holder to facilitate systematic investigation of proton acceleration as a function of target parameters. An alternative mode of operation involving a plasma mirror (Ziener et al 2003;Dromey et al 2004), to further extend the contrast range available with this laser, is illustrated in the inset of figure 3.…”

Section: Experimental Approach At the Lund Laser Centrementioning

confidence: 99%

“…Enhanced contrast pulses are produced by inserting a plasma mirror (Ziener et al 2003;Dromey et al 2004) into the focusing beam, as illustrated in the inset of figure 3. A planar plasma mirror was operated at 458 in p-polarization giving a measured energy reflectivity of 41%.…”

Section: Proton Acceleration With Ultra-high Contrast Laser Pulsesmentioning

confidence: 99%

High-intensity laser-driven proton acceleration: influence of pulse contrast

McKenna

Lindau²,

Lundh³

et al. 2006

Phil. Trans. R. Soc. A.

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Proton acceleration from the interaction of ultra-short laser pulses with thin foil targets at intensities greater than 10 18 W cm −2 is discussed. An overview of the physical processes giving rise to the generation of protons with multi-MeV energies, in well defined beams with excellent spatial quality, is presented. Specifically, the discussion centres on the influence of laser pulse contrast on the spatial and energy distributions of accelerated proton beams. Results from an ongoing experimental investigation of proton acceleration using the 10 Hz multi-terawatt Ti : sapphire laser (35 fs, 35 TW) at the Lund Laser Centre are discussed. It is demonstrated that a window of amplified spontaneous emission (ASE) conditions exist, for which the direction of proton emission is sensitive to the ASE-pedestal preceding the peak of the laser pulse, and that by significantly improving the temporal contrast, using plasma mirrors, efficient proton acceleration is observed from target foils with thickness less than 50 nm.

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“…At such intensities, any illumination of the target above the ionization threshold (10 11 -10 12 W cm −2 ) can generate a pre-plasma which expands and dramatically changes the scale length of the interaction. The ability to control the scale length of the interaction [28] led to significant effort in improving the laser contrast and developing pre-pulse mitigation strategies (frequency doubling of high power short pulses [29,30] ; plasma mirrors [31] ; saturable absorbers [32] ; XPW techniques [33] ; low gain OPA [34] ; short pulse OPA [35] ).…”

Section: Motivationmentioning

confidence: 99%

Petawatt class lasers worldwide

Danson

Hillier

Hopps

et al. 2015

High Pow Laser Sci Eng

486

318

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The use of ultra-high intensity laser beams to achieve extreme material states in the laboratory has become almost routine with the development of the petawatt laser. Petawatt class lasers have been constructed for specific research activities, including particle acceleration, inertial confinement fusion and radiation therapy, and for secondary source generation (x-rays, electrons, protons, neutrons and ions). They are also now routinely coupled, and synchronized, to other large scale facilities including megajoule scale lasers, ion and electron accelerators, x-ray sources and z-pinches. The authors of this paper have tried to compile a comprehensive overview of the current status of petawatt class lasers worldwide. The definition of 'petawatt class' in this context is a laser that delivers >200 TW.

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Specular reflectivity of plasma mirrors as a function of intensity, pulse duration, and angle of incidence

Cited by 89 publications

References 13 publications

Demonstration of a plasma mirror based on a laminar flow water film

Demonstration of a plasma mirror based on a laminar flow water film

High-intensity laser-driven proton acceleration: influence of pulse contrast

Petawatt class lasers worldwide

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