Petawatt class lasers worldwide

Danson, C.; Hillier, David; Hopps, N. W.; Neely, D.

doi:10.1017/hpl.2014.52

Cited by 481 publications

(329 citation statements)

References 135 publications

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“…Ongoing advances in high-power laser technology [1] have led to renewed interest in the processes that drive electromagnetic pulse (EMP) generation. Control over the strength and frequency of emission is not just essential for the protection of expensive hardware -it could open the door to a new generation of bespoke laser-driven B-field and radiofrequency sources of interest to the inertial confinement fusion, high-field and astrophysical communities [2][3][4] .…”

Section: Introductionmentioning

confidence: 99%

EMP control and characterization on high-power laser systems

Bradford

Woolsey

Scott

et al. 2018

High Pow Laser Sci Eng

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Giant electromagnetic pulses (EMP) generated during the interaction of high-power lasers with solid targets can seriously degrade electrical measurements and equipment. EMP emission is caused by the acceleration of hot electrons inside the target, which produce radiation across a wide band from DC to terahertz frequencies. Improved understanding and control of EMP is vital as we enter a new era of high repetition rate, high intensity lasers (e.g. the Extreme Light Infrastructure). We present recent data from the VULCAN laser facility that demonstrates how EMP can be readily and effectively reduced. Characterization of the EMP was achieved using B-dot and D-dot probes that took measurements for a range of different target and laser parameters. We demonstrate that target stalk geometry, material composition, geodesic path length and foil surface area can all play a significant role in the reduction of EMP. A combination of electromagnetic wave and 3D particle-in-cell simulations is used to inform our conclusions about the effects of stalk geometry on EMP, providing an opportunity for comparison with existing charge separation models.

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Section: Introductionmentioning

confidence: 99%

EMP control and characterization on high-power laser systems

Bradford

Woolsey

Scott

et al. 2018

High Pow Laser Sci Eng

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“…Given the considerable powers now provided by ultrashort lasers [29], this reduction should however remain tractable in many cases of interest. All laser beam parameters used in this article are typical of 100 TW-class femtosecond lasers used nowadays for laserdriven electron acceleration experiments [30], for which controlling the light pulse velocity could be particularly …”

Section: Introductionmentioning

confidence: 99%

Controlling the velocity of ultrashort light pulses in vacuum through spatio-temporal couplings

Sainte-Marie¹,

Gobert²,

Quéré³

2017

Optica

162

103

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Due to their broad spectral width, ultrashort lasers provide new possibilities to shape light beams and control their properties, in particular through the use of spatio-temporal couplings. In this context, we present a theoretical investigation of the linear propagation of ultrashort laser beams that combine temporal chirp and a standard aberration known as longitudinal chromatism. When such beams are focused in a vacuum, or in a linear medium, the interplay of these two effects can be exploited to set the velocity of the resulting intensity peak to arbitrary values within the Rayleigh length, i.e. precisely where laser pulses are generally used. Such beams could find groundbreaking applications in the control of laser-matter interactions, in particular for laser-driven particle acceleration.

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“…ELI-NP is a currently build large European research facility that will produce multi-PW femtosecond laser pulses of ultra-relativistic intensity (~10 23 W/cm 2 ) to perform research in laser-based nuclear physics and related applications [5]. In the basic concept of the fission-fusion reaction mechanism [2,6], fissile isotopes (like 232 Th) accelerated by an intense laser pulse will enable the interaction of a dense beam of fission fragments with a second target, also consisting of fissile isotopes.…”

Section: Introductionmentioning

confidence: 99%

Numerical studies of acceleration of thorium ions by a laser pulse of ultra-relativistic intensity

Domański

Badziak

2018

EPJ Web of Conferences

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Abstract. One of the key scientific projects of ELI-Nuclear Physics is to study the production of extremely neutron-rich nuclides by a new reaction mechanism called fission-fusion using laser-accelerated thorium ( 232 Th) ions. This research is of crucial importance for understanding the nature of the creation of heavy elements in the Universe; however, they require Th ion beams of very high beam fluencies and intensities which are inaccessible in conventional accelerators. This contribution is a first attempt to investigate the possibility of the generation of intense Th ion beams by a fs laser pulse of ultra-relativistic intensity. The investigation was performed with the use of fully electromagnetic relativistic particle-in-cell code. A sub-µm thorium target was irradiated by a circularly polarized 20-fs laser pulse of intensity up to 10 23 W/cm 2 , predicted to be attainable at ELI-NP. At the laser intensity ~ 10 23 W/cm 2 and an optimum target thickness, the maximum energies of Th ions approach 9.3 GeV, the ion beam intensity is > 10 20 W/cm 2 and the total ion fluence reaches values ~ 10 19 ions/cm 2 . The last two values are much higher than attainable in conventional accelerators and are fairly promising for the planned ELI-NP experiment.

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Petawatt class lasers worldwide

Cited by 481 publications

References 135 publications

EMP control and characterization on high-power laser systems

EMP control and characterization on high-power laser systems

Controlling the velocity of ultrashort light pulses in vacuum through spatio-temporal couplings

Numerical studies of acceleration of thorium ions by a laser pulse of ultra-relativistic intensity

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