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Browsing 115 articles

X-Ray Spectral Imaging Probes How Sun-Like Plasma Blocks Light
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X-Ray Spectral Imaging Probes How Sun-Like Plasma Blocks Light

Eyal Kroupp and Tal Queller –  

Temporal measurements in conditions similar to those in the Sun rebut a leading hypothesis for why models and experiments disagree on how much light iron absorbs.   Read More »

Brighter X Rays from Ultralight Silver Material
focus

Brighter X Rays from Ultralight Silver Material

Shooting a laser pulse at a porous silver target generates more intense x rays than previous targets, which will help studies of matter in extreme conditions.   Read More »

Electrons Channel Surf to Ultrahigh Energies
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Electrons Channel Surf to Ultrahigh Energies

Marlene Turner –  

A laser-driven electron accelerator delivers beams of 10-GeV electrons—an approach that could lead to cheaper, more compact alternatives to large-scale x-ray sources and particle accelerators.   Read More »

How Magnetic Waves Become Heat in Earth’s Magnetosphere
Research News

How Magnetic Waves Become Heat in Earth’s Magnetosphere

Observations confirm a theoretical model explaining how—in Earth’s magnetosphere—large-scale magnetic waves heat up the magnetosphere’s plasma by transferring their energy to smaller-scale acoustic waves.   Read More »

A New Twist on Stellarator Design
synopsis

A New Twist on Stellarator Design

Breaking the problem into pieces makes it easier to design a fusion reactor’s coils for optimum energy confinement.   Read More »

An Efficient Way to Optimize Laser-Driven Nuclear Fusion
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An Efficient Way to Optimize Laser-Driven Nuclear Fusion

An automatic, algorithmic technique can find optimal laser configurations for inertial-confinement fusion—one of two main fusion approaches.   Read More »

Tracking the Chaos That Surrounds the Aurora
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Tracking the Chaos That Surrounds the Aurora

Applying data mining tools to a rich observational dataset has enabled researchers to track the turbulent plasma clouds that accompany the aurora.   Read More »

Deriving Fundamental Constants from Three-Beam Collisions
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Deriving Fundamental Constants from Three-Beam Collisions

A proposed experiment involving an x-ray beam and two optical beams could determine the values of fundamental constants in quantum electrodynamics.   Read More »

Solar Composition Altered by Plasma Waves
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Solar Composition Altered by Plasma Waves

Michael Hahn –  

New solar observations indicate that plasma waves are responsible for the Sun’s outer atmosphere having different abundances of chemical elements than the Sun’s other layers.   Read More »

Filamentation Observed in Wakefield Acceleration
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Filamentation Observed in Wakefield Acceleration

A particle-beam-generating method—called wakefield acceleration—uses proton bunches, which can fragment into high-density filaments as a result of their interactions with plasma, new experiments show.   Read More »

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