Physics

Machine learning speeds modeling of experiments aimed at capturing fusion energy on Earth

Machine learning can help bring to Earth the clean fusion energy that lights the sun and stars. Researchers are using this form of artificial intelligence to create a model for rapid control of plasma -- the state of matter composed of free electrons and atomic nuclei, or ions -- that fuels fusion reactions.

Manipulating atoms one at a time with an electron beam

The ultimate degree of control for engineering would be the ability to create and manipulate materials at the most basic level, fabricating devices atom by atom with precise control.

Heart of next-generation chip-scale atomic clock

Physicists have demonstrated an experimental, next-generation atomic clock -- ticking at high 'optical' frequencies -- that is much smaller than usual, made of just three small chips plus supporting electronics and optics.

Development of a displacement sensor to measure gravity of smallest source mass ever

One of the most unknown phenomena in modern physics is gravity. Its measurement and laws remain somewhat of an enigma. Researchers have revealed important information about a new aspect of the nature of gravity by probing the smallest mass-scale.

Development of a displacement sensor to measure gravity of smallest source mass ever

One of the most unknown phenomena in modern physics is gravity. Its measurement and laws remain somewhat of an enigma. Researchers at Tohoku University have revealed important information about a new aspect of the nature of gravity by probing the smallest mass-scale.

Record-shattering underwater sound

A team of researchers has produced a record-shattering underwater sound with an intensity that eclipses that of a rocket launch. The intensity was equivalent to directing the electrical power of an entire city onto a single square meter, resulting in sound pressures above 270 decibels. The team, which included researchers from the Department of Energy's SLAC National Accelerator Laboratory, published their findings on April 10 in Physical Review Fluids.

Restaurant acoustics that schmeckt

Acoustics consultant Klaus Genuit says that new International Standards Organization guidelines for defining, measuring and evaluating soundscapes are a big step forward in guiding the creation of audibly fine restaurants.

Exploring the scientific potential of the ATLAS Experiment at the High-Luminosity LHC

The High-Luminosity upgrade of the Large Hadron Collider (HL-LHC) is scheduled to begin colliding protons in 2026. This major improvement to CERN's flagship accelerator will increase the total number of collisions in the ATLAS experiment by a factor of 10. To cope with this increase, ATLAS is preparing a complex series of upgrades including the installation of new detectors using state-of-the-art technology, the replacement of aging electronics, and the upgrade of its trigger and data acquisition system.

Atomic 'wave function': Research sheds new light

Physicists have demonstrated a new way to obtain the essential details of an isolated quantum system through direct observation. The method gives information about the likelihood of finding atoms at specific locations in the system with unprecedented spatial resolution far better than an optical microscope can provide. With this technique, scientists can obtain details on a scale of tens of nanometers -- smaller than the width of a virus.

Balancing the beam: Thermomechanical micromachine detects terahertz radiation

Radiation from many parts of the electromagnetic spectrum has been harnessed for extremely beneficial uses, in fields as diverse as medicine, imaging and photography, and astronomy. However, the terahertz (THz) region of the spectrum, situated between microwaves and infrared light, has been relatively underutilized owing to difficulties in generating such radiation artificially and in building devices to detect it.

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