Fiber lasers and amplifiers are common in a number of national defense applications. Increasing the average power of these lasers is straightforward: Use multiple lasers in multi-mode operation. However, to maintain the ability to focus, single-mode operation is often necessary. Scientists at Lawrence Livermore National Laboratory have developed Efficient Mode-Converters for High-Power Fiber Amplifiers as a way to help developers scale fiber-based laser installations to higher power levels while still retaining effective focus.
Lawrence Livermore National Laboratory has developed an accelerated high-throughput pulse screener, Laser SHIELD (Screening at High-throughput to Identify Energetic Laser Distortion), that can identify harmful pulses across 48 locations using a single, real-time 34-GHz oscilloscope.
One of the most overlooked threats to human health is poor indoor air quality. Various air pollutants exist indoors, including biological pollutants, secondhand smoke, combustion pollutants and other chemicals, and can pool in spaces with inadequate ventilation. Determining the source of pollution is often the first step in improving air quality. Lawrence Livermore National Laboratory’s DNA TRAX, a safe simulant material made with non-biological DNA, can track and quantify indoor airflow.
On Aug.13, 2013, Lawrence Livermore National Laboratory's National Ignition Facility (NIF) focused all 192 of its ultrapowerful laser beams on a tiny deuterium-tritium filled capsule. In the nanoseconds that followed, the capsule imploded and released a neutron yield of nearly 3x1015, or approximately 8,000 joules of neutron energy, approximately three times NIF's previous neutron yield record for cryogenic implosions.
Outbreaks such as the severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome coronavirus (MERS) have afflicted people around the world, yet many people think these trends are on the decline. Quite the opposite is true. The efforts to combat this epidemic are being spearheaded by a team of Lawrence Livermore National Laboratory scientists.
Iron is the most abundant element in Earth's core and the sixth most abundant element in the universe. As a key component of terrestrial planets and exoplanets, iron has been one of the most studied materials under extreme conditions. In a series of campaigns using the OMEGA laser at the Univ. of Rochester, researchers compressed iron up to 5.6 million atmospheres, a record pressure for solid iron.
Andrea Schmidt and her plasma research team received a big boost recently by procuring a $1-million award from the Defense Advanced Research Projects Agency (DARPA), a U.S. Dept. of Defense agency. The award will be used to fund their groundbreaking work in both modeling and experiments of a classic plasma configuration, the Z-pinch.
The use of plasmonic black metals could someday provide a pathway to more efficient photovoltaics to improve solar energy harvesting, according to researchers at Lawrence Livermore National Laboratory (LLNL). The LLNL Materials Engineering Div. research team has made breakthroughs experimenting with black metals. These nanostructured metals are designed to have low reflectivity and high absorption of visible and infrared light.
Americans used more natural gas, solar panels and wind turbines and less coal to generate electricity in 2012, according to the most recent U.S. energy charts released by Lawrence Livermore National Laboratory. Natural gas use is up in the electricity generation sector, where it has basically substituted directly for coal, while sustained low natural gas prices have prompted a shift from coal to gas in the electricity generating sector.
Each year, the Lawrence Livermore National Laboratory releases energy flow charts that track the nation's consumption of energy resources. According to the most recent charts, Americans used more natural gas, solar panels and wind turbines and less coal to generate electricity in 2012.
Three National Nuclear Security Administration (NNSA) sites where The Babcock & Wilcox Co. (B&W) operates have been selected as recipients of R&D Magazine's 2013 R&D 100 Awards. Sites honored include the Y-12 National Security Complex, Lawrence Livermore National Laboratory, and Los Alamos National Laboratory.
Lawrence Livermore National Laboratory researchers are the recipients of five 2013 R&D 100 awards. With this year's results, the Laboratory has captured a total of 148 R&D awards since 1978. U.S. Dept. of Energy national laboratories received a total 36 awards in this year's judging.
When Lawrence Livermore National Laboratory physicist Maxim Umansky flipped through the news, a startling underwater survival story caught his attention. In May, a boat cook survived a 60-hour underwater ordeal 100 feet below the surface after his tugboat sank near the Nigerian coast. Harrison Okene's survival underwater while the rest of the crew perished was astounding.
Tiahne-2, or Milky Way-2, a supercomputer developed by China's National Univ. of Defense Technology, is the new No. 1 ranked machine on the industry-standard Top500 list of the world's most powerful high-performance computing (HPC) systems.
Lawrence Livermore National Laboratory researchers, for the first time, have created movies of irreversible reactions that occur too rapidly to capture with conventional microscopy. The team used multiframe, nanosecond-scale imaging in the dynamic transmission electron microscope to create movies of the crystallization of phase-change materials used for optical and resistive memory.
Using data derived from nuclear weapons testing of the 1950s and '60s, Lawrence Livermore National Laboratory scientists have found that a small portion of the human brain involved in memory makes new neurons well into adulthood. The research may have profound impacts on human behavior and mental health.
Early Earth was not very hospitable when it came to jump starting life. In fact, new research shows that life on Earth may have come from out of this world. A team of scientists found that icy comets that crashed into Earth millions of years ago could have produced life building organic compounds, including the building blocks of proteins and nucleobases pairs of DNA and RNA.
Lawrence Livermore National Laboratory scientists have discovered and demonstrated a new technique to remove and store atmospheric carbon dioxide while generating carbon-negative hydrogen and producing alkalinity, which can be used to offset ocean acidification.
Through experiments and simulations, a team of Lawrence Livermore National Laboratory scientists have found that twin boundaries with good electrical conductivity and a strengthening mechanism in materials may not be so perfect after all.
According to research taking place at Lawrence Livermore National Laboratory, the distortion of the ancient shoreline and flooding surface of the U.S. Atlantic Coastal Plain are the direct result of fluctuations in topography in the region and could have implications on understanding long-term climate change, according to a new study.
The California Energy Commission has awarded $1.7 million to a partnership between Lawrence Livermore National Laboratory and Cool Earth Solar Inc. to conduct a community-scale renewable energy integration demonstration project at the Livermore Valley Open Campus.
The National Nuclear Security Administration announced that its Sequoia supercomputer at Lawrence Livermore National Laboratory has completed its transition to classified computing in support of the Stockpile Stewardship Program, which helps the United States ensure the safety, security, and effectiveness of its aging nuclear weapons stockpile without the use of underground testing.
Scientists at Lawrence Livermore National Laboratory and the University of California, Berkeley have discovered new materials to capture methane, the second highest concentration greenhouse gas emitted into the atmosphere. The research team performed systematic computer simulation studies on the effectiveness of methane capture using two different materials—liquid solvents and nanoporous zeolites.
Researchers at Lawrence Livermore National Laboratory have recently performed a record number of simulations using all 1,572,864 cores of Sequoia, the largest supercomputer in the world. The simulations are the largest particle-in-cell (PIC) code simulations by number of cores ever performed. PIC simulations are used extensively in plasma physics to model the motion of the charged particles
A team of international scientists, including a Lawrence Livermore National Laboratory astrophysicist, has made the most detailed examination yet of the atmosphere of a Jupiter-size like planet beyond our solar system. The finding provides astrophysicists with additional insight into how planets are formed.