Physics

Harnessing the power of AI to understand warm dense matter

The study of warm dense matter helps us understand what is going on inside giant planets, brown dwarfs, and neutron stars. However, this state of matter, which exhibits properties of both solids and plasmas, does not occur naturally on Earth. It can be produced artificially in the lab using large X-ray experiments, albeit only at a small scale and for short periods of time. Theoretical and numerical models are essential to evaluate these experiments, which are impossible to interpret without formulas, algorithms, and simulations.

National laboratories' look to the future of light sources with new magnet prototype

With a powerful enough light, you can see things that people once thought would be impossible. Large-scale light source facilities generate that powerful light, and scientists use it to create more durable materials, build more efficient batteries and computers, and learn more about the natural world.

New concept for rocket thruster exploits the mechanism behind solar flares

A new type of rocket thruster that could take humankind to Mars and beyond has been proposed by a physicist. The device would apply magnetic fields to cause particles of plasma to shoot out the back of a rocket and propel the craft forward.

Breakthrough for laser-induced breakdown spectroscopy

Researchers recently demonstrated a novel technique: plasma-grating-induced breakdown spectroscopy (GIBS).

An efficient tool to link X-ray experiments and ab initio theory

Molecules consisting of many atoms are complex structures. The outer electrons are distributed among the different orbitals, and their shape and occupation determine the chemical behavior and reactivity of the molecule. The configuration of these orbitals can be analyzed experimentally. Synchrotron sources such as BESSY II provide a method for this purpose: Resonant inelastic X-ray scattering (RIXS). However, to obtain information about the orbitals from experimental data, quantum chemical simulations are necessary.

CERN's latest LS2 Report: Beams circulate in the PS Booster

If you follow CERN on social media, you probably saw back in December that the first beam had been injected into the PS Booster (PSB), thus connecting the machine for the first time to the new Linac4.

A Curiously Written Coronavirus Paper

The mystery of "extreme acute respiratory syndrome"

Size of helium nucleus measured more precisely than ever before

In experiments at the Paul Scherrer Institute PSI, an international research collaboration has measured the radius of the atomic nucleus of helium five times more precisely than ever before. With the aid of the new value, fundamental physical theories can be tested and natural constants can be determined even more precisely. For their measurements, the researchers needed muons—these particles are similar to electrons but are around 200 times heavier. PSI is the only research site in the world where enough so-called low-energy muons are produced for such experiments.

How heavy is dark matter? Scientists radically narrow the potential mass range for the first time

Scientists have calculated the mass range for Dark Matter—and it's tighter than the science world thought.

Expert in fluid dynamics explains how to reduce the risk of COVID-19 airborne transmission inside a car

Varghese Mathai is a physicist at the University of Massachusetts Amherst who studies the flow of fluids and gases. He conducted a study using computational fluid dynamics simulations to understand how air flows inside a car and its implications for COVID-19 airborne transmission. In this interview, he explains the optimal ways to ensure maximum airflow inside a car.

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