نتایج جستجو برای: laser beams
تعداد نتایج: 212423 فیلتر نتایج به سال:
Suitable instrumentation for laser-accelerated proton (ion) beams is critical for development of integrated, laser-driven ion accelerator systems. Instrumentation aimed at beam diagnostics and control must be applied to the driving laser pulse, the laser-plasma that forms at the target and the emergent proton (ion) bunch in a correlated way to develop these novel accelerators. This report is a ...
An intruder detection and discrimination sensor with improved optical design is developed using lasers of different wavelength to demonstrate the concept of discrimination over a distance of 6m. A distinctive feature of optics is used to provide additional transverse laser beam scanning. The sample objects used to demonstrate the concept of discrimination over a distance of 6m are leaf, bark, b...
This paper proposes a novel and effective method for generating GigaGauss level, solenoidal quasi-static magnetic fields in under-dense plasma using screw-shaped high intensity laser pulses. This method produces large solenoidal fields that move with the driving laser pulse and are collinear with the accelerated electrons. This is in contrast with already known techniques which rely on interact...
Ultra-high power (exceeding the self-focusing threshold by more than three orders of magnitude) light beams from ground-based laser systems may find applications in space-debris cleaning. The propagation of such powerful laser beams through the atmosphere reveals many novel interesting features compared to traditional light self-focusing. It is demonstrated here that for the relevant laser para...
Nuclear reactions initiated by laser-accelerated particle beams are a promising new approach to many applications, from medical radioisotopes to aneutronic energy production. We present results demonstrating the occurrence of secondary nuclear reactions, initiated by the primary nuclear reaction products, using multicomponent targets composed of either natural boron (B) or natural boron nitride...
We present results on a Raman laser-system that resonantly drives a closed two-photon transition between two levels in different hyperfine ground states of (87)Rb. The coupler is based on a novel optical design for producing two phase-coherent optical beams to drive a Raman transition. Operated as an outcoupler, it produces an atom laser in a single internal atomic state, with the lower diverge...
In this review we consider three important applications of lasers in high energy physics: γγ, γe colliders, laser cooling, positron production. These topics are actual now due to plans of construction linear ee, ee, γγ, γe colliders with energies 0.3–1 TeV. High energy photons for γγ, γe collisions can be obtained using laser backscattering. These types of collisions considerably increase physi...
LLE Review, Volume 95 179 Introduction The interaction of laser beams with plasmas near the criticaldensity surface is an important characteristic feature of directdrive inertial confinement fusion (ICF) experiments.1,2 One of the main laser–plasma interaction processes is stimulated Brillouin scattering (SBS), which involves the decay of an incident light wave into a scattered light wave and a...
Compact and affordable ion accelerators based on laser-produced plasmas have potential applications in many fields of science and medicine. However, the requirement of producing focusable, narrow-energy-spread, energetic beams has proved to be challenging. Here we demonstrate that laser-driven collisionless shocks can accelerate proton beams to ∼20 MeV with extremely narrow energy spreads of ab...
Precise knowledge of laser beam parameters is a key requirement in many photonics applications including for lasers and optics used in the transportation industry. This paper reports on a novel motion-free laser beam characterization system using electronically agile digital and analog photonics such as a Digital Micromirror Device (DMD) and an analog variable focal length lens. The proposed sy...
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