Lawrence Livermore National Laboratory scientists have modeled actinide-based alloys, such as spent nuclear fuel, in an effort to predict the impact of evolving fuel chemistry on material performance. This work could have direct implications for the use of spent nuclear fuel as another source of energy.
Using the VUV Free-Electron Laser FLASH at Deutsches Elektronen-Synchrotron in Hamburg, Germany, Lawrence Livermore National Laboratory researchers were part of a team that took a sneak peek deep into the lower atmospheric layers of giant gas planets such as Jupiter or Saturn.
Scientists who study past pandemics, such as the 14th-century Black Death that devastated much of Europe, might soon be turning to an innovative biological detection technology for some extra help. The apparent first use of this technology, known as a microarray, for studying pathogens from ancient DNA, was reported by a team of scientists in Scientific Reports.
Lawrence Livermore National Laboratory has joined forces with two other national laboratories—Oak Ridge and Argonne—to deliver next-generation supercomputers able to perform up to 200 peak petaflops, about 10 times faster than today's most powerful high-performance computing (HPC) systems.
Volcanic eruptions in the early part of the 21st century have cooled the planet, according to a study led by Lawrence Livermore National Laboratory. This cooling partly offset the warming produced by greenhouse gases. Despite continuing increases in atmospheric levels of greenhouse gases, and in the total heat content of the ocean, global-mean temperatures at the surface of the planet have shown relatively little warming since 1998.
For the first time, an international team of astrophysicists has unraveled how stars blow up in supernova explosions. Using NASA's Nuclear Spectroscopic Telescope Array (NuSTAR), the international collaboration created the first-ever map of radioactive material in a supernova remnant, named Cassiopeia A. The findings reveal how shock waves likely rip apart massive dying stars, and ultimately end their lives.
Tularemia is endemic in the northeastern U.S., and is considered to be a risk to biosecurity, much like anthrax or smallpox, because it has already been weaponized in various regions of the world. A postdoctoral researcher at Lawrence Livermore National Laboratory has recently described his work to uncover the secrets of the bacterium Francisella tularensis, which causes tularemia, also known as "rabbit fever."
An international team of researchers has demonstrated a new method for studying the structure of proteins that could lead to important advances in biology and other fields. For the first time, protein crystals have been studied in 2-D at room temperature with x-rays, using a new technique that could open the door for scientists to learn more about an important class of proteins that constitute about one-third of all human proteins.
Ignition has long been considered the "holy grail" of inertial confinement fusion science. A key step along the path to ignition is to have "fuel gains" greater than unity, where the energy generated through fusion reactions exceeds the amount of energy deposited into the fusion fuel. Though ignition remains the ultimate goal, the milestone of achieving fuel gains greater than one has been reached for the first time ever on any facility.
A team of physicists have used statistical mechanics and mathematical modeling to shed light on something known as epigenetic memory, which allows an organism to create a biological memory of some variable condition, such as quality of nutrition or temperature. The model highlights the "engineering" challenge a cell must constantly face during molecular recognition.
Lawrence Livermore National Laboratory researchers have begun to develop a technique that provides a practical approach for looking into the complex physical and chemical processes that occur during fallout formation following a nuclear detonation. Post-detonation nuclear forensics relies on advanced analytical techniques and an understanding of the physio-chemical processes associated with a nuclear detonation to identify the device type.
Space weathering, which works similar to geological erosion on the Earth, produces water in the rims of tiny particles of interplanetary dust. The discovery may have implications on the origins of life and sources of water throughout the galaxy. As a byproduct of star formation, water ice is the most abundant solid material in the universe. But this new source was a surprise.
A ground-penetrating bomb, minus its nuclear components, rammed through a target at the remote Coyote Canyon test range last month in Sandia National Laboratories’ first such rocket-driven impact test in seven years. Engineers said the Sandia components on the weapon performed as expected.
In an effort to put to good use natural gas (methane) that might otherwise become pollution, Lawrence Livermore National Laboratory is collaborating with start-up company Calysta Energy on a new technology to convert natural gas to liquid fuel. The process involves taking natural gas from oil and gas operations, and converting it to methanol that can be used as a fuel or converted to other useful chemicals.
After nearly a decade of development and testing, an advanced instrument for directly imaging and analyzing planets orbiting around other stars is pointing skyward and collecting light from distant worlds. For the past decade, a multi-institutional team has designed, engineered, built and optimized the instrument, called the Gemini Planet Imager, which will be used for high-contrast imaging to study faint planets next to bright stars.
A Lawrence Livermore National Laboratory team has recently produced some of the highest energy betatron x-rays ever demonstrated, with the added benefit of being produced on a system the size of a large tabletop. Betatron x-ray radiation, produced when relativistic electrons are accelerated and oscillate in a laser-driven plasma channel, is an x-ray source holding great promise for future high-energy-density science experiments.
Using a new isotope technique and deep sea corals gathered near the Hawaiian Islands, a Lawrence Livermore National Laboratory scientist, in collaboration with Univ. of California Santa Cruz colleagues, has determined that a long-term shift in nitrogen content in the Pacific Ocean has occurred as a result of climate change. This shift is similar to major paleoceanographic transitions in the sedimentary record.
Lawrence Livermore National Laboratory researchers have combined ultra-fast time-resolved experimental measurements with theory to reveal how an explosive responds to a high-impact shock. The work involved advances in both ultra-fast experimental shock wave methods and molecular dynamics (MD) simulation techniques, and the combination of experiment and simulation is a milestone in understanding chemical initiation and detonation.
The rain in Spain may lie mainly on the plain, but the location and intensity of that rain is changing not only in Spain but around the globe. A new study by Lawrence Livermore National Laboratory scientists shows that observed changes in global (ocean and land) precipitation are directly affected by human activities and cannot be explained by natural variability alone.
The first solids to form in the solar system contain unusual isotopic signatures that show a nearby supernova injected material within ~100,000 years of their formation. That supernova, caused from the cataclysmic death of a star, could have even triggered the birth of the sun.
Researchers from Lawrence Livermore National Laboratory (LLNL) and the Swiss Federal Institute of Technology (ETH) in Zurich have developed a new method of using nanotubes to detect molecules at extremely low concentrations enabling trace detection of biological threats, explosives and drugs.
Lawrence Livermore National Laboratory in partnership with Intel and Cray, announced a unique high-performance computing (HPC) cluster that will serve research scientists at all three institutions and provide a proving ground for new HPC and big data technologies and architectures.
Scientists have used the powerful x-ray laser at the SLAC National Accelerator Laboratory to create movies detailing trillionths-of-a-second changes in the arrangement of copper atoms after an extreme shock. The study pinpointed the precise breaking point when the extreme pressures began to permanently deform the copper structure, or lattice, so it could no longer bounce back to its original shape.
A research team, led by the Univ. of California, Santa Cruz, developed a solar-microbial device that combines a microbial fuel cell (MFC) and a photoelectrochemical cell (PEC). In the MFC component, bacteria degrade organic matter in the wastewater, generating electricity. The biologically generated electricity is delivered to the PEC component to assist the solar-powered splitting of water that generates hydrogen and oxygen.
A team of Lawrence Livermore National Laboratory (LLNL) researchers has pioneered the use of a long-standing technology for a new application—analyzing the chemical composition of uranium samples. In a paper published in Applied Spectroscopy, LLNL scientists describe the first reported use of near-infrared spectrometry to study the chemical properties of uranium ore concentrates, also called yellowcake.