Physics

Physicists contribute to dark matter detector success

In researchers' quest for evidence of dark matter, physicist Andrea Pocar of the University of Massachusetts Amherst and his students have played an important role in designing and building a key part of the argon-based DarkSide-50 detector located underground in Italy's Gran Sasso National Laboratory.

Unprecedented single-digit-nanometer magnetic tunnel junction demonstrated

A research group from Tohoku University has revealed ultra-small magnetic tunnel junctions (MTJs) down to a single-digit-nanometer scale that have sufficient retention properties and yet can be switched by a current.

Some black holes erase your past

In the real world, your past uniquely determines your future. If a physicist knows how the universe starts out, she can calculate its future for all time and all space.

NASA Awards Contract for Facilities Operations, Maintenance Services

NASA has awarded the Facilities Operations and Maintenance Services (FOMS) III contract, an 8(a) set-aside acquisition, to Akima Support Operations, LLC of Colorado Springs, Colorado.

Reaching new heights in laser-accelerated ion energy

A laser-driven ion acceleration scheme could lead to compact ion sources for established and innovative applications in science, medicine and industry.

NASA Television Coverage Set for Weather Satellite Science Briefing, Launch

The National Oceanic and Atmospheric Administration’s (NOAA’s) newest weather satellite, Geostationary Operational Environmental Satellite-S (GOES-S), is scheduled to launch Thursday, March 1. The launch, as well as prelaunch and science briefings on Tuesday, Feb. 27, will air live on NASA Television and the agency’s website.

Laser-ranged satellite measurement now accurately reflects Earth's tidal perturbations

Tides on Earth have a far-reaching influence, including disturbing satellites' measurements by affecting their motion. The LAser RElativity Satellite (LARES), is the best ever relevant test particle to move in the Earth's gravitational field. In a new study, LARES proves its efficiency for high-precision probing of General Relativity and fundamental physics.

Shedding (high-power laser) light on the plasma density limit

Researchers theoretically proposed the existence of density limit for hole boring by laser light on matter. They derived the maximum plasma density as a function of laser intensity, where hole boring stops and plasma blowout occurs. Theory and simulation of an ultra-high-pressure plasma state, wherein plasma's density pushes light back in the direction of the laser source, contribute to fundamental understanding, and provided grounding for applications such as laser-induced nuclear fusion.

Laser-ranged satellite measurement now accurately reflects Earth's tidal perturbations

Tides on Earth have a far-reaching influence, including disturbing satellites' measurements by affecting their motion. This disturbance can be studied using a model for the gravitational potential of the Earth, taking into account the fact that Earth's shape is not spherical. The LAser RElativity Satellite (LARES), is the best ever relevant test particle to move in the Earth's gravitational field. In a new study published in EPJ Plus, LARES proves its efficiency for high-precision probing of General Relativity and fundamental physics.

Quintillionths of a second in slow motion

Many chemical processes run so fast that they are only roughly understood. To clarify these processes, researchers have now developed a methodology with a resolution of quintillionths of a second. The new technology stands to help better understand processes like photosynthesis and develop faster computer chips.

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